TITLE: Green Manures and Cover Crops
 PUBLICATION DATE:  September 1993
 ENTRY DATE:  April 1995
 EXPIRATION DATE:  
 UPDATE FREQUENCY: 
 CONTACT:  Jane Gates
           Alternative Farming Systems Information Center
           National Agricultural Library
           Room 304, 10301 Baltimore Ave.
           Beltsville, MD  20705-2351
           Telephone:  (301) 504-6559
           FAX:  (301) 504-6409
           Internet:  afsic@nal.usda.gov
 DOCUMENT TYPE:  text
 DOCUMENT SIZE:  27 3k (127 pages)
 
 
 ==============================================================
                                              ISSN:  1052-5378
 United States Department of Agriculture
 National Agricultural Library
 10301 Baltimore Blvd.
 Beltsville, Maryland  20705-2351
 
 Green Manures and Cover Crops
 January 1991 - July 1993
 
 QB 93-68
 Quick Bibliography SeriesBibliographies in the Quick Bibliography Series of the
 National Agricultural Library, are intended primarily for
 current awareness, and as the title of the series implies, are
 not indepth exhaustive bibliographies on any given subject. 
 However, the citations are a substantial resource for recent
 investigations on a given topic.  They also serve the purpose
 of bringing the literature of agriculture to the interested
 user who, in many cases, could not access it by any other
 means.  The bibliographies are derived from computerized on-
 line searches of the AGRICOLA data base.  Timeliness of topic
 and evidence of extensive interest are the selection criteria.
 
 The author/searcher determines the purpose, length, and search
 strategy of the Quick Bibliography.  Information regarding
 these is available upon request from the author/searcher.
 
 Copies of this bibliography may be made or used for
 distribution without prior approval.  The inclusion or
 omission of a particular publication or citation may not be
 construed as endorsement or disapproval.
 
 To request a copy of a bibliography in this series, send the
 series title, series number and self-addressed gummed label
 to:
 
 U.S. Department of Agriculture
 National Agricultural Library
 Public Services Division, Room 111
 Beltsville, Maryland 20705
 
 Green Manures and Cover Crops
 January 1991 - July 1993
 
 
 Quick Bibliography Series:  QB 93-68
 Updates QB 92-11
 
 268 citations in English from AGRICOLA
 
 Jane Potter Gates
 Alternative Farming Systems Information Center
 
 
 
 September 1993National Agricultural Library cataloging Record:
 
 Gates, Jane Potter
   Green manures and cover crops.
   (Quick bibliography series ; 93-68)
   1. Green manure crops--Bibliography. 2. Cover crops--
 Bibliography. I. Title.
 aZ5071.N3 no.93-68
 
 AGRICOLA
 
 Citations in this bibliography were entered in the AGRICOLA
 database between January 1979 and the present.
 
 
 SAMPLE CITATIONS
 
 Citations in this bibliography are from the National
 Agricultural Library's AGRICOLA database.  An explanation of
 sample journal article, book, and audiovisual citations
 appears below.
 
 JOURNAL ARTICLE:
 
   Citation #                                     NAL Call No.
   Article title.
   Author.  Place of publication:  Publisher.  Journal Title.
   Date.  Volume (Issue).  Pages.  (NAL Call Number).
 
 Example:
   1                             NAL Call No.:  DNAL 389.8.SCH6
   Morrison, S.B.  Denver, Colo.:  American School Food Service
   Association.  School foodservice journal.  Sept 1987. v. 41
   (8). p.48-50. ill.
 
 BOOK:
 
   Citation #                                   NAL Call Number
   Title.
   Author.  Place of publication:  Publisher, date. Information
   on pagination, indices, or bibliographies.
 
 Example:
 
   1                        NAL Call No.:  DNAL RM218.K36 1987
   Exploring careers in dietetics and nutrition.
   Kane, June Kozak.  New York:  Rosen Pub. Group, 1987.
   Includes index.  xii, 133 p.: ill.; 22 cm.  Bibliography:
   p. 126.
 
 AUDIOVISUAL:
 
   Citation #                                  NAL Call Number
   Title.
   Author.  Place of publication:  Publisher, date.
   Supplemental information such as funding.  Media format
   (i.e., videocassette):  Description (sound, color, size).
 
 Example:
   1                    NAL Call No.: DNAL FNCTX364.A425 F&N AV
   All aboard the nutri-train.
   Mayo, Cynthia.  Richmond, Va.:  Richmond Public Schools,
   1981.  NET funded.  Activity packet prepared by Cynthia
   Mayo.  1 videocassette (30 min.): sd., col.; 3/4 in. +
   activity packet.                 GREEN MANURES AND COVER CROPS
 
                         SEARCH STRATEGY
 
 Set  Items     Description
 
 S1   2767      COVER/TI,DE
 S2   65813     CROP?/TI,DE
 S3   629       COVER()CROP?/TI,DE
 S4   8327      GREEN/TI,DE
 S5   5465      MANUR?/TI,DE
 S6   616       GREEN()MANURE?/TI,DE
 S7   4364      LIVING
 S8   1770      MULCH?
 S9   38        LIVING(W)MULCH?
 S10  86        OVERSEED?
 S11  124       LIVING()MULCH? OR OVERSEED?
 S12  1325      S3 OR S6 OR S11
 S13  412       AZOLLA
 S14  40525     INDIA?
 S15  1219      S12 NOT (AZOLLA OR INDIA?)
 S16  1019      S15/ENG
 S17  413       PUTTING
 S18  22011     GREEN?
 S19  69        PUTTING(W)GREEN?
 S20  603       GOLF
 S21  22011     GREEN?
 S22  80        GOLF(W)GREEN?
 S23  1007      S16 NOT (PUTTING()GREEN? OR GOLF()GREEN?)
 S24  1007      S23/ENG
 S25  255527    UD=9101 : UD=9999
 S26  256       S24 AND UD=9101 : UD=9999
                  GREEN MANURES AND COVER CROPS
 
 1                                    NAL Call. No.: 381 J8223
 [14C]-gamma-hexachlorocyclohexane in a flooded soil with green
 manuring. Drego, J.; Murthy, N.B.K.; Raghu, K.
 Washington, D.C. : American Chemical Society; 1990 Jan.
 Journal of agricultural and food chemistry v. 38 (1): p.
 266-268; 1990 Jan. Includes references.
 
 Language:  English
 
 Descriptors: Hch; Microbial degradation; Soil; Green manures
 
 Abstract:  The fate of [14C]-gamma-hexachlorocyclohexane
 (gamma-HCH) was studied in green manure amended and unamended
 flooded soils with a continuous-flow system permitting 14C
 mass balance. There was a greater loss of radioactivity in the
 form of organic volatiles and 14CO2 in green manure amended
 than unamended soil. The organic volatile compound formed was
 identified as benzene. Green manure amendment considerably
 decreased the levels of extractable residues from soil. Bound
 residue formation was also less in green manure amended than
 unamended soil.
 
 
 2                                      NAL Call. No.: 4 AM34P
 Activity of nitrification processes in the fall and winter
 months. Bartholomew, R.P.
 Madison, Wis. : American Society of Agronomy; 1932 Jun.
 Journal of the American Society of Agronomy v. 24 (6): p.
 435-442; 1932 Jun.
 
 Language:  English
 
 Descriptors: Arkansas; Secale cereale; Vicia; Cover crops;
 Nitrification; Soil biology; Nitrates; Nitrogenous compounds;
 Soil fertility; Nitrogen content; Autumn; Winter; Air
 temperature; Cultivation; Silt loam soils; Sandy loam soils
 
 Abstract:  Results of experiments to determine whether
 nitrification takes place in soils which are subjected to cold
 periods with intermittent warm periods are reported. Studies
 to determine the value and efficiency of cover crops are also
 reported. The results may be summarized as follows: (1)
 Nitrates were produced in soil during the fall and winter
 months; (2) relatively large amounts of nitrates disappeared
 from soils not planted to cover crops; and (3) cover crops are
 efficient means of preventing loss of soluble nitrogenous
 compounds from the soil.
 
 
 3                                  NAL Call. No.: SB950.A1I66
 Ageratum cover crops aids citrus biocontrol in China.
 Zhang, A.; Olkowski, W.
 Berkeley, Calif. : Bio-Integral Resource Center; 1989 Sep. The
 IPM practitioner v. 11 (9): p. 8-10; 1989 Sep.  Includes
 references.
 
 Language:  English
 
 Descriptors: China; Ageratum conyzoides; Biological control;
 Citrus fruits; Mite control; Predatory mites
 
 
 4                                    NAL Call. No.: QH573.N37
 Allelopathic control of Fusarium oxysporum f. sp. radicis-
 lycopersici. Jarvis, W.R.
 Berlin, W. Ger. : Springer-Verlag; 1989.
 NATO ASI series : Series H : Cell biology v. 28: p. 479-486;
 1989.  In the series analytic: Vascular wilt diseases of
 plants: basic studies and control / edited by E.C. Tjamos and
 C.H. Beckman. Proceedings of the NATO Advanced Research
 Workshop on the Interaction of Genetic and Environmental
 Factors in the Development of Vascular Wilt Diseases of
 Plants, May 22-27, 1988, Athens, Greece.  Literature review. 
 Includes references.
 
 Language:  English
 
 Descriptors: Lycopersicon esculentum; Fusarium oxysporum;
 Fungal diseases; Root rots; Fungus control; Plant disease
 control; Allelopathy; Fungal antagonists; Green manures;
 Allelochemicals; Literature reviews; Lactuca sativa; Taraxacum
 officinale
 
 
 5                                 NAL Call. No.: 79.9 SO8 (P)
 Allelopathic cover crops to reduce herbicide input.
 Worsham, A.D.
 Raleigh, N.C. : The Society :.; 1991.
 Proceedings - Southern Weed Science Society v. 44: p. 58-69;
 1991.  Paper presented at the meeting on "Perception: Fact or
 Fiction", held January 14-16, 1991, San Antonio, Texas. 
 Includes references.
 
 Language:  English
 
 Descriptors: North Carolina; Cover crops; Allelopathy;
 Herbicides; Application rates; Weed control
 
 
 6                                 NAL Call. No.: S494.5.S86S8
 Alternative soil and pest management practices for sustainable
 production of fresh-market cabbage.
 Roberts, B.W.; Cartwright, B.
 Binghamton, N.Y. : Food Products Press; 1991.
 Journal of sustainable agriculture v. 1 (3): p. 21-35; 1991. 
 Includes references.
 
 Language:  English
 
 Descriptors: Oklahoma; Brassica oleracea; Secale cereale;
 Vicia villosa; Cover crops; Soil; Sustainability; Soil
 management; Pest management
 
 
 7                                     NAL Call. No.: 100 L939
 Alternative tillage systems and cover crops for cotton
 production on the Macon Ridge.
 Hutchinson, R.L.; Shelton, W.L.
 Baton Rouge, La. : The Station; 1990.
 Louisiana agriculture - Louisiana Agricultural Experiment
 Station v. 33 (4): p. 6-8; 1990.
 
 Language:  English
 
 Descriptors: Louisiana; Gossypium; Crop production; Tillage;
 Systems; Cover crops
 
 
 8                                      NAL Call. No.: 4 AM34P
 The availability of hydrated lime, limestone, and dolomite of
 two degrees of fineness, with supplements of red clover hay,
 as measured by lysimeter leachings.
 MacIntire, W.H.; Sanders, K.B.; Shaw, W.M.
 Madison, Wis. : American Society of Agronomy; 1933 Apr.
 Journal of the American Society of Agronomy v. 25 (4): p.
 285-297; 1933 Apr. Includes references.
 
 Language:  English
 
 Descriptors: Trifolium pratense; Liming materials; Fineness;
 Lysimetry; Green manures; Carbonates; Bicarbonates; Nitrates;
 Sulfates; Potassium; Nitrate nitrogen
 
 Abstract:  In applying the foregoing results obtained in a 4-
 year study with 18 pairs of lysimeters several points are to
 be considered. Commercial limestone and the home-ground
 products differ. The former is often a product consisting
 solely of finely ground material. The latter is generally a
 mixture of different finenesses, limited by the character of
 rock as it affects tonnage per diem in grinding, wear on
 machinery, and ultimate cost. Since the commercial products
 are usually finer than the coarser separates used in the
 present experiment, the results may be interpreted as applying
 directly for such products and for types of soil similar to
 the one used and under comparable climatic conditions. For a
 soil of good fixing capacity, even without marked acidity, the
 100- to 200-mesh fineness of either limestone or dolomite is
 comparable to an equivalence of hydrated lime, when evaluated
 by enhanced nitrification and sulfate generation, soluble Ca
 plus Mg, and repressive effects upon potassium solubility for
 the 4-year period. The same holds for the 40- to 50-mesh
 limestone. The 40- to 50-mesh dolomite is not so readily
 available during the first year, but the disparity is not
 great. Since the heavier types of soils of greater acidity
 would effect a disintegration more rapid and intensive than
 that found for the well-buffered, near-neutral soil used, it
 would follow that the fineness of 40- to 50-mesh is ample for
 such soils, especially if an appreciable period elapse between
 the incorporation and the seeding. For sandy soils, however,
 it would be expected that the differences attributable to
 fineness would be greater than those found for the heavier
 type of soil. This would be especially true in case of the
 less soluble dolomite, which should be exceedingly fine when
 used in sandy soils. Although the total amounts of soluble Ca
 plus Mg derived from the several dolomite additions were
 generally comparable to, though slightly in excess of, those
 found for the corresponding li
 
 
 9                                 NAL Call. No.: S79.E8 no.17
 Bacteriological effects of green manure study no. III.
 Briscoe, Chas. F.; Harned, Horace Hammerton, 1886-
 Agricultural College, Miss. : Mississippi Agricultural
 Experiment Station,; 1929.
 11 p. : ill. ; 23 cm. s. (Technical bulletin (Mississippi
 Agricultural Experiment Station) ; no. 17.).  Cover title. 
 Pts. 1 and 2 published in Mississippi Agricultural Experiment
 Station Bulletin 168 and 185.
 
 Language:  English
 
 Descriptors: Green manuring
 
 
 10                                      NAL Call. No.: S1.N32
 Bank on buckwheat: it's one of the best weed-smothering crops
 money can buy. Hofstetter, B.
 Emmaus, Pa. : Rodale Institute; 1992 Feb.
 The New farm v. 14 (2): p. 52-53; 1992 Feb.
 
 Language:  English
 
 Descriptors: Buckwheat; Cover crops; Weed control
 
 
 11                                NAL Call. No.: S544.3.M9M65
 Berseem clover: a potential hay and green manure crop for
 Montana. Baldridge, D.; Dunn, R.; Ditterline, R.; Sims, J.;
 Welty, L.; Wichman, D.; Westcott, M.; Stalknecht, G.
 Bozeman, Mont. : The Service; 1992 Jan.
 Montguide MT : Agriculture - Montana State University,
 Cooperative Extension Service (9201): 3 p.; 1992 Jan. 
 Includes references.
 
 Language:  English
 
 Descriptors: Montana; Trifolium alexandrinum; Bloat; Hay; Crop
 yield; Field tests; Nutrient content; Green manures
 
 
 12                                   NAL Call. No.: TD930.A32
 Bioresource potential of Sesbania bispinosa (Jacq.) W. F.
 Wight. Prasad, M.N.V.
 Essex : Elsevier Science Publishers; 1993.
 Bioresource technology v. 44 (3): p. 251-254; 1993.  Includes
 references.
 
 Language:  English
 
 Descriptors: Sesbania bispinosa; Green manures; Salt tolerance
 
 
 13                                   NAL Call. No.: 280.8 SY8
 Bugs, weeds, and fine wine.
 Hamilton, J.
 New York, N.Y. : McGraw-Hill :.; 1992 Aug10.
 Business week (3278): p. 30; 1992 Aug10.
 
 Language:  English
 
 Descriptors: California; Cover crops; Organic farming;
 Viticulture; Sustainability
 
 
 14                                 NAL Call. No.: QK898.N6N52
 Cajanus cajan accession evaluation for green leaf manure
 production and coppicing ability.
 Rosecrance, R.; Dominick, W.; Macklin, B.
 Bangkok, Thailand : Thailand Institute of Scientific and
 Technological Research; 1989 Aug.
 Nitrogen fixing tree research reports v. 7: p. 81-82; 1989
 Aug.  Includes references.
 
 Language:  English
 
 Descriptors: Hawaii; Cajanus cajan; Biomass production; Green
 manures; Coppicing; Variety trials; Crop yield; Cultivars
 
 
 15                                  NAL Call. No.: QH84.8.B46
 Carbon dioxide evolution from wheat and lentil residues as
 affected by grinding, added nitrogen, and the absence of soil.
 Bremer, E.; Houtum, W. van; Van Kessel, C.
 Berlin : Springer International; 1991.
 Biology and fertility of soils .v 11 (3): p. 221-227; 1991. 
 Includes references.
 
 Language:  English
 
 Descriptors: Saskatchewan; Plant residues; Lentils; Wheat;
 Green manures; Soil air; Soil biology; Carbon-nitrogen ratio;
 Carbon dioxide; Decomposition; Nitrogen; Particle size
 
 
 16                                     NAL Call. No.: 4 AM34P
 Chemical and microbiological principles underlying the
 decomposition of green manures in the soil.
 Waksman, S.A.
 Madison, Wis. : American Society of Agronomy; 1929 Jan.
 Journal of the American Society of Agronomy v. 21 (1): p.
 1-18; 1929 Jan. Includes references.
 
 Language:  English
 
 Descriptors: Green manures; Decomposition; Microbial
 degradation; Chemical degradation; Soil bacteria; Soil
 chemistry
 
 
 17                                     NAL Call. No.: 4 AM34P
 Chemical and microbiological principles underlying the
 transformation of organic matter in the preparation of
 artificial manures.
 Waksman, S.A.; Tenney, F.G.; Diehm, R.A.
 Madison, Wis. : American Society of Agronomy; 1929 May.
 Journal of the American Society of Agronomy v. 21 (5): p.
 533-546; 1929 May. Includes references.
 
 Language:  English
 
 Descriptors: Green manures; Animal manures; Decomposition;
 Chemical degradation; Microbial degradation; Soil organic
 matter
 
 
 18                                    NAL Call. No.: 56.9 SO3
 Chemical attributes of soils subjected to no-till cropping
 with rye cover crops.
 Eckert, D.J.
 Madison, Wis. : The Society; 1991 Mar.
 Soil Science Society of America journal v. 55 (2): p. 405-409;
 1991 Mar. Includes references.
 
 Language:  English
 
 Descriptors: Ohio; Secale cereale; Zea mays; Glycine max; Soil
 chemistry; Calcium; Carbon; Magnesium; Nitrogen fertilizers;
 Phosphorus; Potassium; No-tillage; Rotations; Soil fertility;
 Soil physical properties
 
 Abstract:  Rye (Secale cereale L.) cover crops are often
 promoted to supply additional residue in no-till production
 situations; however, the effect of inclusion of rye on soil
 chemical properties is largely unknown. Soils were sampled, 20
 cm deep, from four 4-yr studies in which no-till corn (Zea
 mays L.) and soybean (Glycine max L. Merr.) were grown
 continuously or in rotation on a Canfield silt loam (fine-
 loamy, mixed, mesic Aquic Fragiudalf) or in rotation only on a
 Hoytville silty clay (fine, illitic, mesic Mollic Ochraqualf),
 with and without a winter rye cover crop. Corn had been
 fertilized each spring with 224 kg N ha(-1) as either injected
 anhydrous ammonia or surface-broadcast urea-ammonium nitrate
 (UAN) solution. All plots sampled showed greater
 concentrations of organic C, exchangeable K, and Bray-1
 extractable P in the surface 5-cm increment of soil than
 deeper in the sampled profile. Exchangeable Ca and Mg
 concentrations were often less at this depth than deeper in
 the profile, particularly when N was applied as surface-
 broadcast UAN solution. Soil pH was generally lowest in the
 zone of N application. Addition of the rye cover crop had
 little effect on the distribution of chemical attributes,
 other than increasing concentrations of exchangeable K near
 the soil surface in several comparisons.
 
 
 19                                    NAL Call. No.: 80 AM371
 A clean choice.
 Bremer, A.H.
 Chicago, Ill. : American Nurseryman Publishing Company; 1993
 Jun01. American nurseryman v. 177 (11): p. 38-41; 1993 Jun01.
 
 Language:  English
 
 Descriptors: Ornamental woody plants; Plantations; Cover
 crops; Trifolium pratense; Grasses; Crop mixtures
 
 
 20                                      NAL Call. No.: SB1.H6
 Cold protection of leatherleaf fern using crop covers and
 overhead irrigation in shadehouses.
 Stamps, R.H.
 Alexandria, Va. : American Society for Horticultural Science;
 1991 Jul. HortScience v. 26 (7): p. 862-865; 1991 Jul. 
 Includes references.
 
 Language:  English
 
 Descriptors: Florida; Arachniodes adiantiformis; Cold;
 Protection; Cover crops; Overhead irrigation; Cold injury;
 Shading; Greenhouses; Vase life; Responses
 
 Abstract:  Four spunbonded crop covers were evaluated for use
 with and without irrigation for cold protection of leatherleaf
 fern [Rumohra adiantiformis (Forst.) Ching]. Heavier and less
 porous covers provided the most protection when used without
 over-the-crop irrigation. However, differences in cover weight
 and porosity did not affect temperatures under covers when
 over-the-crop irrigation was applied. Damage to immature
 fronds was decreased by 75% to 99% when the covers were used
 alone and by 98% to 99% when the covers were used with over-
 the-crop irrigation. Covers had no effect on frond vase life.
 
 
 21                                  NAL Call. No.: S605.5.A43
 Coming full circle--the new emphasis on soil quality.
 Haberern, J.
 Greenbelt, Md. : Institute for Alternative Agriculture; 1992.
 American journal of alternative agriculture v. 7 (1/2): p.
 3-4; 1992.
 
 Language:  English
 
 Descriptors: U.S.A.; Soil fertility; Nutrient content; Crops;
 Food quality; Soil management; Sustainability; Cover crops;
 Rotations
 
 
 22                             NAL Call. No.: 100 M36S no.199
 Comparison of commercial fertilizers and stable manure.
 College Park : Maryland Agricultural Experiment Station,;
 1916. p. [95]-106 ; 23 cm. (Bulletin (Maryland Agricultural
 Experiment Station) ; no. 199.).  Caption title.  December,
 1916.
 
 Language:  English
 
 Descriptors: Fertilizers; Farm manure; Green manuring
 
 
 23                                     NAL Call. No.: 4 AM34P
 A comparison of legume intercycle crops for pineapples.
 Magistad, O.C.; King, N.; Allen, O.N.
 Madison, Wis. : American Society of Agronomy; 1934 May.
 Journal of the American Society of Agronomy v. 26 (5): p.
 372-380; 1934 May. Includes references.
 
 Language:  English
 
 Descriptors: Hawaii; Ananas comosus; Cajanus cajan;
 Crotalaria; Cassia tora; Crop yield; Soil physical properties;
 Flowering; Seed germination; Seed production; Nitrogen
 content; Experimental plots; Moisture content; Weight; Acid
 soils; Nitrogen fixation; Cover crops
 
 Abstract:  These experiments were conducted at the Wahiawa
 Sub-station, Island of Oahu, T.H., with the purpose of testing
 the value of six leguminous plants, namely, Cajanus cajan,
 Crotalaria juncea, C. spectabilis, C. anagyroides, Stizolobium
 utile, and Cassia tora under ordinary growth conditions. 1.
 The Latin square method of plat arrangement was followed. The
 soil of the plats was acid, pH value 4.9, and very low in
 available phosphorus. Both of these conditions were
 unfavorable to the good growth of the tested crops. 2.
 Relative germination of the respective lots of seed, tonnage
 of the crops on a wet and dry basis, and amount of nitrogen
 fixed were considered as indices of the suitability of the
 crops. The data were mathematically interpreted. 3. Cassia
 tora did not prove acceptable as a cover crop under any
 conditions provided in this test. 4. The plants tested may be
 divided into two general groups with respect to growth period.
 Crotalaria juncea and Stizolobium utile excelled in wet weight
 and nitrogen content at the end of the 91-day period.
 Crotalaria juncea had produced at this period 7,006 pounds of
 wet material of which 68.83 +/- 0.96% was moisture and 2.34
 +/- 0.025% nitrogen, while Stizolobium utile produced 8,511
 pounds of wet material containing 77.58 +/-0.25% moisture and
 2.21 +/- 0.156% nitrogen. The remaining plants, together with
 S. utile, proved most acceptable after 197 days of growth. 5.
 In brief, the legumes may be arranged in descending order with
 respect to the following: A. Wet weight at the end of the 91-
 day period: Stizolobium utile, Crotalaria juncea, C.
 anagyroides, C. spectabilis, Cajanus cajan, Cassia tora. B.
 Wet weight at the end of 157 days: Stizolobium utile,
 Crotalaria spectabilis, C. anagyroides, Cajanus cajan,
 Crotalaria juncea, Cassia tora. C. Dry weights at the end of
 91 days: Crotalaria juncea, Stizolobium utile, Crotalaria
 anagyroides, Cajanus cajan, Crotalaria spectabilis, Cassia
 tora. D. Dry weights at the end of 157 days: Sti
 
 
 24                              NAL Call. No.: 100 V81S no.19
 A comparison of methods for determining soil acidity and a
 study of the effects of green manures on soil acidity.
 Hill, H. H.
 Blacksburg, Va. : Virginia Agricultural Experiment Station,;
 1919. 25 p. ; 24 cm. (Technical bulletin (Virginia
 Agricultural Experiment Station) ; 19.).  Cover title. 
 Includes bibliographical references.
 
 Language:  English; English
 
 Descriptors: Soil acidity; Green manuring
 
 
 25                                    NAL Call. No.: SB249.N6
 A comparison of tillage systems and cover crops for cotton
 production on a loessial soil in northeast Louisiana.
 Hutchinson, R.L.; Sharpe, T.R.
 Memphis, Tenn. : National Cotton Council of America; 1989.
 Proceedings - Beltwide Cotton Conferences (Book 2): p.
 517-519; 1989.  Meeting held January 2-7, 1989, Nashville,
 Tennessee.  Includes references.
 
 Language:  English
 
 Descriptors: Louisiana; Gossypium hirsutum; Tillage; Cover
 crops; Loess soils; Silt loam soils
 
 
 26                                   NAL Call. No.: S605.5.B5
 Comparison of weed biomass and flora in four cover crops and a
 subsequent lettuce crop on three New England organic farms.
 Schonbeck, M.; Browne, J.; Deziel, G.; DeGregorio, R.
 Oxon : A B Academic Publishers; 1991.
 Biological agriculture and horticulture : an international
 journal v. 8 (2): p. 123-143; 1991.  Includes references.
 
 Language:  English
 
 Descriptors: Fagopyrum esculentum; Fagopyrum tataricum; Secale
 cereale; Avena sativa; Sorghum bicolor; Trifolium pratense;
 Lolium multiflorum; Echinochloa crus-galli; Cover crops;
 Lactuca sativa; Cultural weed control; Weeds; Biomass;
 Botanical composition; Dry matter accumulation; Coverage; Crop
 residues; Crop weed competition; Environmental factors;
 Climatic factors; Soil fertility; Crop yield; Establishment;
 Regrowth; Suppression; Tillage
 
 
 27                                     NAL Call. No.: 4 AM34P
 A comparison of winter legume green manure and nitrate of soda
 for fertilizing cotton.
 Hale, G.A.
 Madison, Wis. : American Society of Agronomy; 1936 Feb.
 Journal of the American Society of Agronomy v. 28 (2): p.
 156-159; 1936 Feb.
 
 Language:  English
 
 Descriptors: Georgia; Gossypium hirsutum; Green manures; Vicia
 villosa; Sodium nitrate; Application rates; Crop yield; Crop
 density; Sandy loam soils
 
 Abstract:  An 8-year field experiment was conducted on Cecil
 sandy loam soil at the Georgia Experiment Station in which
 winter legume green manure, nitrate of soda, and a combination
 of green manure and nitrate of soda were compared for
 fertilizing cotton. Hairy vetch and Austrian pea green manure
 turned under 2 weeks before planting cotton produced slightly
 larger cotton yields than 100 pounds per acre of nitrate of
 soda applied when the cotton was planted. Treatments comparing
 200 pounds per acre of nitrate of soda and a winter legume
 green manure crop for fertilizing cotton showed an 8-year
 average difference of 110 pounds seed cotton per acre in favor
 of the commercial nitrate. Supplementing the green manure with
 100 and 200 pounds of nitrate of soda per acre increased
 yields over green manure alone as cotton fertilizer. Stands,
 as shown by both the total number of plants and hills per acre
 at picking, were slightly better on the green manure and
 nitrate of soda alone treatments than on the other treatments
 where both fertilizers were used.
 
 
 28                                     NAL Call. No.: 4 AM34P
 The composition of the spring growth of sweet clover as
 influenced by previous fall treatment.
 Badger, C.J.; Snider, H.J.
 Madison, Wis. : American Society of Agronomy; 1933 Feb.
 Journal of the American Society of Agronomy v. 25 (2): p.
 105-108; 1933 Feb. Includes references.
 
 Language:  English
 
 Descriptors: Melilotus alba; Seasonal growth; Mineral content;
 Plant analysis; Roots; Shoots; Hay; Removal; Green manures;
 Winter hardiness; Plant composition; Harvesting date
 
 Abstract:  This study was carried out in order to determine
 the influence of the practice of removing a fall hay crop upon
 the composition of the sweet clover the following spring at
 about the stage of growth that it is usually plowed under as a
 green manure. The effect of cutting on September 18 as well as
 on October 18 was compared to that where no hay was removed.
 Analysis of the sweet clover tops and roots show that removal
 of the fall growth reduced the total dry matter, total
 nitrogen, phosphorus, and potassium in the following spring
 growth. The results show also that cutting for fall hay
 reduces the vitality or winter resistance of the sweet clover
 plants. This was reflected in a thinner stand and a less
 vigorous spring growth where fall cutting was practiced.
 
 
 29                                NAL Call. No.: S544.3.N6N62
 Conservation tillage for burley tobacco: nitrogen management.
 Hoyt, G.D.
 Raleigh, N.C. : The Service; 1989 Jan.
 AG - North Carolina Agricultural Extension Service, North
 Carolina State University v.): p. 26-29; 1989 Jan.  In the
 series analytic: 1989 burley tobacco information.  Includes
 statistical data.
 
 Language:  English
 
 Descriptors: North Carolina; Nicotiana tabacum; Conservation
 tillage; Nitrogen; Nitrogen fertilizers; Cover crops;
 Statistics
 
 
 30                                     NAL Call. No.: 4 AM34P
 Conserving residual corn fertilizer nitrogen with winter cover
 crops. Shipley, P.R.; Meisinger, J.J.; Decker, A.M.
 Madison, Wis. : American Society of Agronomy; 1992 Sep.
 Journal of the American Society of Agronomy v. 84 (5): p.
 869-876; 1992 Sep. Includes references.
 
 Language:  English
 
 Descriptors: Maryland; Zea mays; Nitrogen fertilizers;
 Nitrogen; Uptake; Winter; Cover crops; Vicia villosa;
 Trifolium incarnatum; Secale cereale; Lolium multiflorum;
 Fallow; Weed control; Stellaria media; Nutrients;
 Conservation; Recovery; Dry matter accumulation; Silt loam
 soils
 
 Abstract:  Autumn residual fertilizer nitrogen (FN) can be
 easily leached into groundwater in humid climates. Winter
 cover crops were evaluated for their ability to assimilate
 residual corn FN and thereby reduce N losses. Labelled FN (15N
 depleted) was applied to corn in Maryland in 1986 and 1987 at
 rates of 0, 168, and 336 kg FN ha-1 on a Mattapex silt loam
 (fine-loamy, mixed, typic Hapludult). Cover crop treatments
 following corn harvest were hairy vetch (Vicia villosa Roth),
 crimson clover (Trifolium incarnatum L.), cereal rye (Secale
 cereale L.), or annual ryegrass (Lolium multiflorum Lam.), and
 a weed/fallow control of chickweed (Stellaria media L.). The
 covers were harvested three times the following spring and dry
 matter yields (DM), %N, and atom % 15N were determined to
 assess FN uptake. Fall labelled N in the soil (to 80 cm)
 averaged 17 and 114 kg FN ha-1 over both years for the 168 and
 336 kg FN ha-1 rates, respectively. However, the quantity of
 total residual mineral N (soil N plus FN) after the 168 kg
 ha-1 rate was 87 kg N ha-1, which was comparable to the
 quantity of labelled N at the high fertilizer rate. The
 average cover crop FN uptake (kg FN ha-1) in mid-April after
 the 336 kg N ha-1 treatment was 48 for cereal rye, 29 for
 annual ryegrass, 9 for hairy vetch, 8 for crimson clover, and
 6 kg FN ha-1 for the native weed cover (LSD P = 0.05 of 7 kg
 FN ha-1). Corresponding percent recoveries of the fall N in
 the aboveground DM were 45% for cereal rye, 27% for annual
 ryegrass, 10% for hairy vetch, 8% for crimson clover, and 8%
 for native weed cover. These results show that grass cover
 crops conserved the most FN. Cereal rye recovered wore FN
 through mid-April because of its growth in cool weather,
 although annual ryegrass was equally effective if grown to
 mid-May. Renewed efforts should be made to utilize grass cover
 crops to conserve N in humid climates.
 
 
 31                                    NAL Call. No.: SB249.N6
 Control of weeds in cotton with winter covercrops.
 Keeley, P.; Thullen, R.; Carter, L.; Chesson, J.
 Memphis, Tenn. : National Cotton Council of America; 1992.
 Proceedings - Beltwide Cotton Conferences v. 3: p. 1304-1307;
 1992.  Paper presented at the Cotton Weed Science Research
 Conference, 1992.  Includes references.
 
 Language:  English
 
 Descriptors: Gossypium; Cover crops; Weeds; Pest control
 
 
 32                                    NAL Call. No.: SB925.B5
 Cool-season cover crops in the pecan orchard understory:
 effects on Coccinellidae (Coleoptera) and pecan aphids
 (Homoptera: Aphididae). Bugg, R.L.; Dutcher, J.D.; McNeill,
 P.J.
 Orlando, Fla. : Academic Press; 1991 Jun.
 Biological control v. 1 (1): p. 8-15; 1991 Jun.  Includes
 references.
 
 Language:  English
 
 Descriptors: Georgia; Carya illinoensis; Orchards; Cover
 crops; Vicia villosa; Secale cereale; Population density;
 Biological control agents; Natural enemies; Hippodamia
 convergens; Coccinellidae; Coccinella septempunctata;
 Biological control; Rhopalosiphum padi; Frankliniella;
 Acyrthosiphon pisum; Acyrthosiphon kondoi
 
 
 33                                    NAL Call. No.: 421 J822
 Cool-season cover crops relay intercropped with cantaloupe:
 influence on a generalist predator, Geocoris punctipes
 (Hemiptera: Lygaeidae). Bugg, R.L.; Wackers, F.L.; Brunson,
 K.E.; Dutcher, J.D.; Phatak, S.C. Lanham, Md. : Entomological
 Society of America; 1991 Apr. Journal of economic entomology
 v. 84 (2): p. 408-416; 1991 Apr.  Includes references.
 
 Language:  English
 
 Descriptors: Georgia; Cucumis melo; Cover crops; Insect
 control; Intercropping; Predators of insect pests; Beneficial
 insects; Density; Geocoris punctipes
 
 Abstract:  Cool-season cover crops were used in efforts to
 enhance densities of entomophagous insects on relay-
 intercropped spring plantings of cantaloupe (Cucumis melo L.
 var. reticulatus Seringe). Eight cover-cropping regimes,
 including a weedy fallow control, were tested in a replicated
 trial. Cover crop significantly affected densities of the
 predominant predator, a bigeyed bug, Geocoris punctipes (Say),
 amid cover crops, on or near cantaloupe plants, and on or near
 sentinel egg masses of fall armyworm, Spodoptera frugiperda
 (J. E. Smith) pinned to cantaloupe leaves. No significant
 difference was found for proportions of egg masses occupied or
 damaged by predators. For all indices of predator abundance
 and efficiency, absolute responses were highest for the plots
 of subterranean clover (Trifolium subterraneum L., 'Mt.
 Barker'). Numbers of G. punctipes per sentinel egg mass were
 significantly greater for the subterranean clover regime than
 for rye, crimson clover, and a polyculture of six cover crops,
 but were not significantly greater than for 'Vantage' vetch or
 the weedy fallow control plots. Rye showed particularly low
 densities of G. punctipes. Cover crops had no apparent effect
 on densities of aphids or whiteflies (Homoptera: Aphididae,
 Aleyrodidae) on cantaloupe leaves.
 
 
 34                                  NAL Call. No.: S539.5.J68
 Corn growth and yield in an alfalfa living mulch system.
 Eberlein, C.V.; Sheaffer, C.C.; Oliveira, V.F.
 Madison, Wis. : American Society of Agronomy; 1992 Jul.
 Journal of production agriculture v. 5 (3): p. 332-339; 1992
 Jul.  Includes references.
 
 Language:  English
 
 Descriptors: Minnesota; Zea mays; Medicago sativa; Mulches;
 Plant competition; Soil water content; No-tillage; Plowing;
 Atrazine; Glyphosate; Suppression; Available water; Irrigated
 conditions; Crop yield; Grain; Meteorological factors;
 Seasonal variation; Growth analysis; Soil conservation
 
 
 35                                 NAL Call. No.: QK898.N6N52
 Corn growth as affected by nitrogen fixing tree and grass
 plant materials supplemented by P and K fertilizers.
 Tiraa, A.N.; Asghar, M.
 Bangkok, Thailand : Thailand Institute of Scientific and
 Technological Research; 1990 Aug.
 Nitrogen fixing tree research reports v. 8: p. 83-84; 1990
 Aug.  Includes references.
 
 Language:  English
 
 Descriptors: Zea mays; Leguminosae; Nitrogen fixing trees;
 Gramineae; Green manures; Phosphorus; Fertilizers; Potassium
 fertilizers; Crop yield; Crop residues
 
 
 36                                     NAL Call. No.: 4 AM34P
 Corn response to rye cover crop management and spring tillage
 systems. Rainbault, B.A.; Vyn, T.J.; Tollenaar, M.
 Madison, Wis. : American Society of Agronomy; 1990 Nov.
 Agronomy journal v. 82 (6): p. 1088-1093; 1990 Nov.  Includes
 references.
 
 Language:  English
 
 Descriptors: Ontario; Zea mays; Secale cereale; Winter; Cover
 crops; Double cropping; Crop residues; No-tillage; Discing;
 Plowing; Crop yield; Grain; Dry matter accumulation; Leaf area
 index; Flowering date; Erosion; Soil water content; Soil
 management
 
 Abstract:  The use of a winter rye (Secale cereale L.) corn
 (Zea mays L.) double cropping sequence in combination with
 appropriate tillage practices could increase biomass
 production and reduce soil erosion potential in southern
 Ontario. A 3-yr study (1982-1984) was conducted at two
 locations to determine the potential of this sequence for
 double cropping, and to evaluate spring tillage systems and
 management of the rye residue on subsequent productivity of
 corn. Winter rye was planted in early October after corn
 silage harvest and either chemically killed or harvested as
 silage in the spring before corn planting. Rye treatments
 consisted of no rye, rye harvested in the spring and rye
 residue left on the plots. Spring cultivation treatments were
 no-till, tandem discing, and moldboard plowing followed by
 secondary tillage. The use of a winter rye cover crop delayed
 corn development and reduced corn biomass yield by 11% at the
 Elora location and by 17% at the Woodstock location. The
 adverse effect of the rye crop was more pronounced under no-
 till than where the soil was tilled. Removal or retention of
 the rye residue had no consistent effect on the subsequent
 corn crop. An allelopathic effect resulting from the rye crop
 may be one plausible explanation for the reduction in corn
 yield. Total biomass yield (rye + corn) was increased relative
 to corn alone, if the soil was cultivated. Therefore, a winter
 rye-corn sequence may still be of interest, despite a
 reduction in corn yield, especially if advantages such as
 total biomass production and the potential for decreased soil
 erosion during fall and winter are considered.
 
 
 37                                     NAL Call. No.: 4 AM34P
 Corn response to rye cover crop, tillage methods, and planter
 options. Raimbault, B.A.; Vyn, T.J.; Tollenaar, M.
 Madison, Wis. : American Society of Agronomy; 1991 Mar.
 Agronomy journal v. 83 (2): p. 287-290; 1991 Mar.  Includes
 references.
 
 Language:  English
 
 Descriptors: Ontario; Zea mays; Cover crops; Secale cereale;
 No-tillage; Plowing; Tillage; Planters; Coulters; Crop
 residues; Preplanting treatment; Application date; Timing;
 Paraquat; Crop yield; Dry matter accumulation
 
 Abstract:  Studies in Ontario have shown that corn (Zea mays
 L.) yields are reduced when corn is seeded immediately after
 rye (Secale cereale L.) harvest or chemical kill of winter
 rye. A study was conducted in 1983 and 1984 on a Maryhill
 (Typic Hapludalf) loam soil to determine the effect of spring
 tillage systems and timing of rye chemical kill on the
 subsequent corn crop. The rye was seeded in early October
 after corn silage harvest. The tillage treatments consisted of
 (i) moldboard plow plus secondary tillage, (ii) strip tillage,
 (iii) no-tillage with ripple coulters (iv) no-tillage with
 disc furrowers plus plow coulters, and (v) no-tillage with
 ripple coulters plus plow coulters. The rye kill treatments
 were early (2 wk before planting) or late (just prior to corn
 planting). Corn whole-plant yields averaged 13.6 and 12.4 Mg
 ha-1 for early and late rye kill, respectively. Corn yield in
 the moldboard plow treatment was higher thin in strip tillage
 and the average of no-till treatments; however, using disc
 furrowers produced yields equal to those with the moldboard
 plow treatment. Moving the residue out of the row with disc
 furrowers resulted in corn yields that were significantly
 higher than those in no-till treatments with ripple coulters.
 The improvement in plant growth due to an early rye kill (as
 opposed to a late rye kill) was often greater with the
 conservation tillage systems relative to the moldboard plow
 treatment. A crop production system is proposed involving
 chemical control of a winter rye cover crop 2 wk before corn
 planting and planting the corn with a modified no-till system
 that removes rye residue from the row area.
 
 
 38                                  NAL Call. No.: S539.5.J68
 Cotton genotype response to green-manured annual legumes.
 Bauer, P.J.; Roach, S.H.; Green, C.C.
 Madison, Wis. : American Society of Agronomy; 1991 Oct.
 Journal of production agriculture v. 4 (4): p. 626-628; 1991
 Oct.  Includes references.
 
 Language:  English
 
 Descriptors: South Carolina; Gossypium hirsutum; Cultivars;
 Genotypes; Varietal reactions; Trifolium incarnatum; Vicia
 villosa; Winter; Cover crops; Fallow; Incorporation; Crop
 density; Crop yield; Seeds; Maturation; Temporal variation;
 Biomass production; Desiccation; Paraquat
 
 
 39                                    NAL Call. No.: SB249.N6
 Cotton lay-by herbicides on wheat, vetch, and winter weeds as
 cover crops. Hurst, H.R.
 Memphis, Tenn. : National Cotton Council of America; 1992.
 Proceedings - Beltwide Cotton Conferences v. 3: p. 1308-1312;
 1992.  Paper presented at the Cotton Weed Science Research
 Conference, 1992.  Includes references.
 
 Language:  English
 
 Descriptors: Triticum aestivum; Vetch; Gossypium; Cover crops;
 Herbicides; Application methods; Weeds
 
 
 40                        NAL Call. No.: KyUThesis 1991 Prima
 Cover crop and tillage effects on soil carbon, nitrogen and
 infiltration rate. Prima, Sandra,
 1991; 1991.
 viii, 74 leaves : ill. ; 28 cm.  Includes vita and abstract. 
 Includes bibliographic references (l. 73).
 
 Language:  English
 
 Descriptors: Soils; Cover crops; Tillage
 
 
 41                                    NAL Call. No.: SB249.N6
 Cover crop management and cotton production on highly erodible
 soils. Banks, J.C.
 Memphis, Tenn. : National Cotton Council of America; 1992.
 Proceedings - Beltwide Cotton Conferences v. 3: p. 1173-1174;
 1992.  Paper presented at the Cotton Soil Management and Plant
 Nutrition Conference, 1992. Includes references.
 
 Language:  English
 
 Descriptors: Gossypium; Crop management; Crop production;
 Erosion
 
 
 42                                  NAL Call. No.: S605.5.A43
 Cover crop management effects on soybean and corn growth and
 nitrogen dynamics in an on-farm study.
 Karlen, D.L.; Doran, J.W.
 Greenbelt, Md. : Institute for Alternative Agriculture; 1991.
 American journal of alternative agriculture v. 6 (2): p.
 71-82; 1991. Includes references.
 
 Language:  English
 
 Descriptors: Iowa; Zea mays; Glycine max; Rotations; Vicia
 villosa; Secale cereale; Avena sativa; Cover crops; Loam
 soils; Conservation tillage; Ridging; Discing; Crop
 management; Sustainability; Farming systems research; Crop
 residues; Ammonium nitrate; Nitrate nitrogen; Use efficiency;
 Nutrient availability; Nutrient uptake; Seasonal growth; Dry
 matter accumulation; Nitrogen; Nutrient content; Air
 temperature; Rain; Seasonal variation; Soil water content;
 Water erosion; Erosion control
 
 Abstract:  Combining cover crops and conservation tillage may
 result in more sustainable agricultural production practices.
 Objectives of this on-farm study were 10 quantify effects of
 cover crops on growth and nitrogen accumulation by soybean
 [Glycine max (L.) Merr.] and corn (Zea mays L.) on a Nicollet
 loam (fine-loamy, mixed, mesic Aquic Hapludoll) near Boone,
 Iowa. Our farmer-cooperator planted soybean in 1988 using
 ridge tillage into an undisturbed strip with a hairy vetch
 (Vicia villosa L. Roth) cover crop and into a strip where
 previous crop residue and a negligible amount of cover crop
 had been incorporated by autumn and spring disking. In each
 strip, we established four plots for soil and plant
 measurements. Our cooperator planted corn on the same strips
 in 1989 into a cover crop that consisted of both hairy vetch
 and winter rye (Secale cereale L.). We determined the source
 of N accumulated by the corn by applying 67 kg N/ha of 15N
 depleted NH4NO3 fertilizer. In the absence of cover crops,
 early season soil NO3-N levels in the top 30 cm were higher,
 and corn growth and N accumulation were more rapid. At
 harvest, the corn grain, stover, and cob together accounted
 for 36 and 39 percent of the 15N fertilizer for the ridge
 tillage and disked treatments, respectively. We suggest that
 lower net mineralization of organic matter or greater
 denitrification losses before planting reduced the
 availability of soil N. This created an early season N stress
 in corn grown with cover crops that was not overcome by
 broadcast fertilizer N applied three weeks after planting. Our
 on-farm research study has helped focus continuing efforts to
 determine if non-recovered fertilizer N is being immobilized
 in microbial biomass, lost by denitrification, or leached
 below the plant root zone.
 
 
 43                                    NAL Call. No.: 56.9 SO3
 Cover crop management of polysaccharide-mediated aggregation
 in an orchard soil.
 Roberson, E.B.; Sarig, S.; Firestone, M.K.
 Madison, Wis. : The Society; 1991 May.
 Soil Science Society of America journal v. 55 (3): p. 734-738;
 1991 May. Includes references.
 
 Language:  English
 
 Descriptors: California; Orchard soils; Prunus domestica;
 Carbohydrates; Cover crops; Hordeum vulgare; Lolium perenne;
 Triticum aestivum; Microbiology; Polysaccharides; Soil
 biology; Soil structure
 
 Abstract:  Soil carbohydrates, including microbial
 extracellular polysaccharides, stabilize soil aggregates and
 improve soil structure. This study examined whether short-term
 management of C inputs by cover crops and tillage affected
 polysaccharide-mediated macroaggregation. Soil was sampled
 from a California prune (Prunus domestica L.) orchard where an
 experiment comparing four management techniques, permanent
 grass cover crop, mowed cover crop, no-till herbicide, and
 conventional tillage, had been in place for two seasons. Cover
 crops significantly increased saturated hydraulic
 conductivity, acid-extractable heavy-fraction carbohydrates
 (those in soil denser than 1.7 g/mL), and macroaggregate
 slaking resistance over clean-cultivated or herbicide
 treatments. Heavy-fraction carbohydrates are probably mainly
 composed of microbial extracellular polysaccharides produced
 in response to cover-crop C inputs. Heavy-fraction
 carbohydrates were significantly correlated with aggregate
 stability and saturated hydraulic conductivity, while total
 organic C and light-fraction carbohydrates were not. There
 were no differences between soil under herbicide and clean-
 cultivation treatments, showing that tillage alone did not
 measurably affect carbohydrate or soil structure. Heavy-
 fraction carbohydrates were shown to be important in the
 initial improvement of soil structure by cover crops.
 
 
 44                                 NAL Call. No.: S541.5.M8S7
 Cover cropping and N fertilization for no-tillage corn
 production in Mississippi.
 Varco, J.J.; Marshall, L.K.
 Mississippi State : Mississippi Agricultural & Forestry
 Experiment Station; 1988 Aug.
 Special bulletin (88-1): p. 47-48; 1988 Aug.  In series
 analytic: Conservation farming: Focus on a better future
 /edited by K.H. Remy. Proceedings of the Southern Conservation
 Tillage Conference, August 10-12, 1988, Tupelo, Mississippi. 
 Includes references.
 
 Language:  English
 
 Descriptors: Mississippi; Zea mays; Yield response functions;
 No-tillage; Cover crops; Vicia villosa; Lolium perenne;
 Ammonium nitrate; Application; Sandy loam soils
 
 
 45                                  NAL Call. No.: SB379.A9A9
 Cover crops.
 McMullin, E.
 Carpinteria, Calif. : Rincon Information Management
 Corporation; 1992 Apr. California grower v. 16 (9): p. 43-44;
 1992 Apr.
 
 Language:  English
 
 Descriptors: California; Citrus oblonga; Cover crops;
 Biological control; Cold injury; Transpiration; Soil texture;
 Nitrogen; Weed control; Cost benefit analysis; Water
 requirements; Erosion control; Irrigation systems
 
 
 46                       NAL Call. No.: Videocassette no.1447
 Cover crops a Blue Moon production.
 Blue Moon Productions, Sustainable Farming Association of
 Minnesota Lewiston, MN : Sustainable Farming Association of
 Minnesota,; 1991. 1 videocassette (18 min.) : sd., col. ; 1/2
 in. (Farming for the future: A farmer-to-farmer series.).
 
 Language:  English
 
 Descriptors: Cover crops; Catch crops
 
 Abstract:  This video demonstrates the dangers of exposing the
 soil to climate and aims to teach farmers the methods for
 preserving the soil in order to prevent soil erosion.
 
 
 47                              NAL Call. No.: SB284.D58 1991
 Cover crops and green manures., 3rd revision 7/91..
 Diver, Steve; Sullivan, Preston
 Appropriate Technology Transfer for Rural Area (Organization)
 Fayetteville, Ark. : Appropriate Technology Transfer for Rural
 Areas ;; 1991. 1 v. (various pagings) ; 28 cm.  Caption title. 
 "Prepared by Steve Diver and Preston Sullivan"--P. 13. 
 Includes bibliographical references.
 
 Language:  English
 
 Descriptors: Cover crops; Green manure crops
 
 
 48                           NAL Call. No.: NBUSB284 C68 1991
 Cover crops for clean water.
 Hargrove, W. L.
 Soil and Water Conservation Society (U.S.)
 Ankeny, Iowa : Soil and Water Conservation Society,; 1991. xi,
 198 p. : ill. ; 28 cm.  Includes bibliographical references.
 
 Language:  English
 
 Descriptors: Cover crops; Water-supply; Water quality
 management
 
 
 49                                   NAL Call. No.: 79.9 W52R
 Cover crops for weed suppression in red raspberries.
 Kaufman, D.; Karow, R.; Sheets, A.; Williams, R.
 S.l. : The Society; 1992.
 Research progress report - Western Society of Weed Science. p.
 VII/2-VII/3; 1992.  Meeting held on March 9-12, 1992, Salt
 Lake City, Utah.
 
 Language:  English
 
 Descriptors: Oregon; Rubus idaeus; Weed control; Cover crops
 
 
 50                                  NAL Call. No.: 100 C12CAG
 Cover crops lower soil surface strength, may improve soil
 permeability. Folorunso, O.A.; Rolston, D.E.; Prichard, T.;
 Louie, D.T. Oakland, Calif. : Division of Agriculture and
 Natural Resources, University of California; 1992 Nov.
 California agriculture v. 46 (6): p. 26-27; 1992 Nov.
 
 Language:  English
 
 Descriptors: California; Cover crops; Water intake;
 Agricultural land; Resistance to penetration; Infiltration;
 Permeability; Soil strength
 
 
 51                                   NAL Call. No.: SB321.G85
 Cover crops: the key to nitrogen management.
 Ashley, R.A.
 Storrs, Conn. : Coop. Ext. Serv., USDA, College of Agriculture
 & Natural Resources, Univ. of Conn; 1992 Sep.
 The Grower : vegetable and small fruit newsletter v. 92 (9):
 p. 1-3; 1992 Sep.
 
 Language:  English
 
 Descriptors: Cover crops; Groundwater pollution; Nitrogen
 fertilizers; Water conservation
 
 
 52                                      NAL Call. No.: S1.M57
 Cover crops: valuable tools for protecting your soil.
 Wooley, D.
 Columbia, Mo. : Missouri Farm Publishing Inc; 1992 Oct.
 Small Farm Today v. 9 (5): p. 18-19; 1992 Oct.
 
 Language:  English
 
 Descriptors: Cover crops; Soil management; Green manures
 
 
 53                                 NAL Call. No.: S544.3.C2C3
 Covercrops for California agriculture.
 Miller, P.R.; Graves, W.L.; Williams, W.A.
 Berkeley, Calif. : The Service; 1989 Oct.
 Leaflet - University of California, Cooperative Extension
 Service (21471): 27 p.; 1989 Oct.  B. A. Madson was author of
 original 1951 edition entitled "Winter covercrops.".  Includes
 references.
 
 Language:  English
 
 Descriptors: California; Cover crops; Legumes; Nitrogen; Soil
 management; Humus; Tilth; Water intake
 
 
 54                               NAL Call. No.: HD1476.U52C27
 Covercrops for the central coast region.
 Davis, Calif. : U.C.D. Small Farm Center; 1991 Sep.
 Small farm news. p. 4; 1991 Sep.
 
 Language:  English
 
 Descriptors: California; Cover crops; Soil; Diseases
 
 
 55                                   NAL Call. No.: 100 M69MI
 Crimson clover benefits soil, crops, and producers.
 Broadway, R.
 Mississippi State, Miss. : The Station; 1991 Dec.
 MAFES research highlights - Mississippi Agricultural and
 Forestry Experiment Station v. 54 (12): p. 7; 1991 Dec.
 
 Language:  English
 
 Descriptors: Trifolium incarnatum; Nitrogen; Nitrogen
 fixation; Cover crops; Zea mays; Production costs; No-tillage
 
 
 56                                     NAL Call. No.: 4 AM34P
 Crimson clover management to enhance reseeding and no-till
 corn grain production.
 Ranells, N.N.; Wagger, M.G.
 Madison, Wis. : American Society of Agronomy; 1993 Jan.
 Agronomy journal v. 85 (1): p. 62-67; 1993 Jan.  Includes
 references.
 
 Language:  English
 
 Descriptors: Zea mays; Cover crops; Trifolium incarnatum; No-
 tillage; Resowing; Strip cropping; Row orientation; Crop
 yield; Grain; Growth rate; Soil water content
 
 Abstract:  Economic savings and increased legume-N use
 efficiency may result from natural reseeding of winter annual
 legume cover crops. A 3-yr experiment was conducted on a Cecil
 fine sandy loam (clayey, kaolinitic, thermic Typic
 Kanhapludult) to examine the effects of crimson clover
 (Trifolium incarnatum L.) strip desiccation width (25, 50, and
 75% of row area) and orientation (parallel or perpendicular to
 plant row) on soil water depletion, corn (Zea mays L.) growth
 and grain yield, and clover reseeding. Additional treatments
 included early desiccation (25% parallel strip 2 wk before
 corn planting), annual seeding (complete desiccation at corn
 planting), and mechanical disruption of clover growth by the
 no-tillage planter. Early-season soil water was lower in
 annual seeded plots compared to the 25% strip treatments each
 year, however, soil water was limiting in only one of 3 yr.
 Crimson clover successfully reseeded in all strip treatments
 each year, with dry matter production ranging from 3.0 to 5.2
 Mg ha-1 in 1990 and from 3.9 to 5.2 Mg ha-1 in 1991. Nitrogen
 content of reseeded crimson clover biomass ranged from 86 to
 134 kg ha-1 in 1990 and 93 to 111 kg ha-1 in 1991. Corn grain
 yield was only marginally affected by clover strip management
 in two out of 3 yr. Results suggest that under adequate
 moisture conditions a 50% desiccated strip has the potential
 to maximize clover N contribution. However, a 75% strip-width
 can minimize potential competition with corn for water and
 reduce physical impedance of the clover cover crop on corn
 growth.
 
 
 57                                  NAL Call. No.: S539.5.J68
 Crimson clover reseeding potential as affected by s-triazine
 herbicides. Ranells, N.N.; Wagger, M.G.
 Madison, Wis. : American Society of Agronomy; 1993 Jan.
 Journal of production agriculture v. 6 (1): p. 90-93; 1993
 Jan.  Includes references.
 
 Language:  English
 
 Descriptors: Trifolium incarnatum; Cover crops; Resowing;
 Atrazine; Cyanazine; Simazine; Residual effects; Application
 date; Crop growth stage
 
 
 58                                     NAL Call. No.: QK1.C83
 Crop rotation.
 Bullock, D.G.
 Boca Raton, Fla. : CRC Press; 1992.
 Critical reviews in plant sciences v. 11 (4): p. 309-326;
 1992.  Literature review.  Includes references.
 
 Language:  English
 
 Descriptors: Rotations; Soil fertility; Cover crops;
 Sustainability; Soil organic matter; Soil structure; Erosion;
 Soil flora; Soil fauna; Insect pests; Allelopathy; Literature
 reviews
 
 
 59                         NAL Call. No.: 100 N48C (1) no.406
 Decomposition of green manures at different stages of growth.
 Martin, Thomas Lysons,
 Ithaca, N.Y. : Cornell University Agricultural Experiment
 Station,; 1921. p. 137-169 ; 23 cm. (Bulletin (Cornell
 University. Agricultural Experiment Station) ; 406.). 
 Bibliography: p. 157.
 
 Language:  English
 
 Descriptors: Green manuring
 
 
 60                         NAL Call. No.: 100 N48C (1) no.394
 The decomposition of sweet clover (Melilotus alba Desr.) as a
 green manure under greenhouse conditions.
 Maynard, Leonard A.
 Ithaca, N.Y. : Cornell University,; 1917.
 p. 119-149 : ill. ; 23 cm. (Bulletin (Cornell University.
 Agricultural Experiment Station) ; 394.).  Bibliography: p.
 148-149.
 
 Language:  English
 
 Descriptors: Sweet clover
 
 
 61                                    NAL Call. No.: 100 AL1H
 Deep tillage ahead of cover crop planting reduces soil
 compaction for following crop.
 Reeves, D.W.; Touchton, J.T.
 Auburn University, Ala. : The Station; 1991.
 Highlights of agricultural research - Alabama Agricultural
 Experiment Station v. 38 (2): p. 4; 1991.
 
 Language:  English
 
 Descriptors: Alabama; Soil compaction; Deep tillage; Cover
 crops
 
 
 62                             NAL Call. No.: S605.5.I45 1989
 Development of organic faming practices for sugarcane based
 farms. Mendosa, T.C.
 Witzenhausen? : Ekopan; 1990.
 Agricultural alternatives and nutritional self-sufficiency :
 for a sustainable agricultural system that respects man and
 his environment : proc of the IFOAM Seventh Int Scientific
 Conference, Ouagadougou, January 2-5, 1989. p. 189-202; 1990. 
 Includes references.
 
 Language:  English
 
 Descriptors: Saccharum officinarum; Glycine max; Vigna
 radiata; Rhizobium; Organic farming; Farming systems;
 Intercropping; Green manures; Crop residues; Biodegradation;
 Row spacing; Row orientation; Planting; Harvesting; Crop
 yield; Soil degradation; Land productivity
 
 
 63                                     NAL Call. No.: 4 AM34P
 The differential influence of certain vegetative covers on
 deep subsoil moisture.
 Myers, H.E.
 Madison, Wis. : American Society of Agronomy; 1936 Feb.
 Journal of the American Society of Agronomy v. 28 (2): p.
 106-114; 1936 Feb.
 
 Language:  English
 
 Descriptors: Kansas; Medicago sativa; Melilotus alba; Glycine
 max; Gramineae; Grasses; Depletion; Water deficit; Soil water;
 Subsoil; Cover crops; Rain; Moisture equivalent; Soil depth;
 Rotations; Continuous cropping
 
 Abstract:  Sweet clover grown continuously on soil for two
 seasons under the condition of this experiment has reduced the
 subsoil moisture in certain instances to a maximum depth of 14
 feet. The data indicate that a reduction approaching the
 minimum point of exhaustion has extended into the thirteenth
 foot section. One year's growth of sweet clover in certain
 cases has reduced the moisture to near the minimum point of
 exhaustion to a maximum depth of 9 feet. Soybeans growing for
 one season have not resulted in the development of a dry layer
 below the sixth foot in any plat included in this study. The
 depth of the moisture reduction by alfalfa and sweet clover
 has been governed largely by the rainfall during the period
 when the legume occupied the soil. The growth of sweet clover
 for either 1 or 2 years under limited rainfall conditions may
 result in the development of a dry layer of depth sufficient
 to prevent the utilization of moisture at a lower level by
 subsequent alfalfa crops.
 
 
 64                                      NAL Call. No.: S1.N32
 Drill your cover crops.
 Cramer, C.
 Emmaus, Pa. : Rodale Institute; 1992 Mar.
 The New farm v. 14 (3): p. 19-21; 1992 Mar.
 
 Language:  English
 
 Descriptors: Cover crops; Drilling; Rye; Cost benefit analysis
 
 
 65                                   NAL Call. No.: 56.8 J822
 Dry matter growth performance of red clover and Italian
 ryegrass as cover crops spring-seeded into fall-seeded winter
 rye in relation to soil physical characteristics.
 Edwards, L.M.
 Ankeny, Iowa : Soil and Water Conservation Society of America;
 1989 May. Journal of soil and water conservation v. 44 (3): p.
 243-247; 1989 May. Includes references.
 
 Language:  English
 
 Descriptors: Dry matter accumulation; Trifolium pratense;
 Lolium multiflorum; Cover crops; Planting date; Spring;
 Autumn; Secale cereale; Soil physics; Rotation
 
 
 66                                    NAL Call. No.: 1.9 P69P
 The effect of cover crops and fertilization with ammonium
 nitrate on corky root of lettuce.
 Van Bruggen, A.H.C.; Brown, P.R.; Shennan, C.; Greathead, A.S.
 St. Paul, Minn. : American Phytopathological Society; 1990
 Aug. Plant disease v. 74 (8): p. 584-588; 1990 Aug.  Includes
 references.
 
 Language:  English
 
 Descriptors: California; Lactuca sativa; Cover crops; Ammonium
 nitrate; Corking; Roots; Secale cereale; Winter; Crop yield;
 Soil water; Soil structure; Inoculum; Seasonal variation;
 Vicia faba; Dry matter; Bacterial diseases; Gram negative
 bacteria; Disease control; Cultural control; Nitrogen content
 
 
 67                                    NAL Call. No.: SD13.C35
 Effect of cover crops on Cylindrocladium sp. in an Ontario
 bare-root nursery. Juzwik, J.; Testa, F.
 Ottawa, Ont. : National Research Council of Canada; 1991 May.
 Canadian journal of forest research; Journal canadien de
 recherche forestiere v. 21 (5): p. 724-728; 1991 May. 
 Includes references.
 
 Language:  English
 
 Descriptors: Ontario; Conifers; Cylindrocladium scoparium;
 Cylindrocladium; Cover crops; Medicago sativa; Sorghum
 bicolor; Triticum aestivum; Linum usitatissimum; Root rots;
 Forest nurseries
 
 Abstract:  Four species were grown as cover crops and
 incorporated into soil of field plots at Midhurst Nursery,
 Midhurst, Ontario, two times per growing season for 2
 successive years. After two seasons, microsclerotial
 populations of Cylindrocladium sp. were higher in soils
 planted with alfalfa (Medicago sativa L., cv. Vernal) (p =
 0.03) and Sudan grass (Sorghum bicolor (L.) Moench, cv. Green
 Leaf) (p = 0.10), and not different in soils with spring wheat
 (Triticum aestivum L., cv. Glen Lea), than populations in
 noncropped, fallow plots. Lower populations of the fungus were
 detected in soils planted with flax (Linum usitatissimum L.)
 (p < 0.08) than in the fallow ones. Highest disease incidence
 in black spruce (Picea mariana (Mill.) B.S.P.) transplants
 occurred when grown in plots treated with alfalfa, Sudan
 grass, and wheat. Disease incidence was lower in transplants
 grown in the flax plots than in those grown in the other plots
 (p < 0.001), including the fallow ones (p = 0.055). Spruce
 mortality was also less in the flax plots compared with all
 other treatment plots (p < 0.001).
 
 
 68                                     NAL Call. No.: SB1.J66
 Effect of cover crops on soil erosion in nursery aisles.
 Cripps, R.W.; Bates, H.K.
 Washington, D.C. : Horticultural Research Institute; 1993 Mar.
 Journal of environmental horticulture v. 11 (1): p. 5-8; 1993
 Mar.  Includes references.
 
 Language:  English
 
 Descriptors: Malus; Acer saccharinum; Live mulches; Lespedeza
 cuneata; Lolium perenne; Trifolium incarnatum; Tillage;
 Erosion; Runoff; Sediment; Runoff water; Rain; Losses from
 soil; Soil conservation; Forest nurseries
 
 
 69                                   NAL Call. No.: 56.8 C162
 Effect of crop rotations and cultural practices on soil
 organic matter, microbial biomass and respiration in a thin
 Black Chernozem. Campbell, C.A.; Biederbeck, V.O.; Zentner,
 R.P.; Lafond, G.P. Ottawa : Agricultural Institute of Canada;
 1991 Aug.
 Canadian journal of soil science v. 71 (3): p. 363-376; 1991
 Aug.  Includes references.
 
 Language:  English
 
 Descriptors: Saskatchewan; Triticum aestivum; Melilotus
 officinalis; Bromus inermis; Medicago sativa; Chernozems; Soil
 organic matter; Crop management; Fertilizers; Rotation;
 Continuous cropping; Fallow; Biomass; Respiration;
 Mineralization; Carbon; Nitrogen; Carbon dioxide; Carbon-
 nitrogen ratio; Plant analysis; Crop residues; Nutrient
 content; Green manures; Straw disposal; Crop yield; Grain;
 Soil depth; A horizons; Long term experiments
 
 
 70                                   NAL Call. No.: 56.8 C162
 Effect of crop rotations and fertilization on soil organic
 matter and some biochemical properties of a thick Black
 Chernozem.
 Campbell, C.A.; Canada; Bowren, K.E.; Schnitzer, M.; Zentner,
 R.P.; Townley-Smith, L.
 Ottawa : Agricultural Institute of Canada; 1991 Aug.
 Canadian journal of soil science v. 71 (3): p. 377-387; 1991
 Aug.  Includes references.
 
 Language:  English
 
 Descriptors: Saskatchewan; Triticum aestivum; Melilotus
 officinalis; Bromus inermis; Medicago sativa; Chernozems; Soil
 organic matter; Crop management; Fertilizers; Continuous
 cropping; Rotations; Fallow; Carbon; Nitrogen; Mineralization;
 Amino acids; Spatial distribution; Amino sugars; Carbon-
 nitrogen ratio; A horizons; Surface layers; Green manures;
 Crop residues; Nutrient content; Soil depth; Biological
 activity in soil; Long term experiments
 
 
 71                                   NAL Call. No.: 56.8 C162
 Effect of cropping practices on the initial potential rate of
 N mineralization in a thin Black Chernozem.
 Campbell, C.A.; LaFond, G.P.; Leyshon, A.J.; Zentner, R.P.;
 Janzen, H.H. Ottawa : Agricultural Institute of Canada; 1991
 Feb.
 Canadian journal of soil science v. 71 (1): p. 43-53; 1991
 Feb.  Includes references.
 
 Language:  English
 
 Descriptors: Saskatchewan; Triticum aestivum; Bromus inermis;
 Medicago sativa; Chernozems; Agricultural soils; Nitrogen;
 Mineralization; Soil organic matter; Rotations; Continuous
 cropping; Green manures; Fertilizers; Soil fertility;
 Sustainability
 
 
 72                                     NAL Call. No.: 4 AM34P
 The effect of different plant materials, lime, and fertilizers
 on the accumulation of soil organic matter.
 Turk, L.M.; Millar, C.E.
 Madison, Wis. : American Society of Agronomy; 1936 Apr.
 Journal of the American Society of Agronomy v. 28 (4): p.
 310-324; 1936 Apr.
 
 Language:  English
 
 Descriptors: Soil organic matter; Sandy loam soils; Green
 manures; Lime; Straw; Carbon; Nitrogen content; Nitrates;
 Ammonium sulfate; Calcium; Soil water retention; Moisture
 equivalent; Carbon-nitrogen ratio
 
 Abstract:  The results of the investigations here reported
 show that materials with a wide carbon-nitrogen ratio lost a
 larger percentage of their carbon than those with a narrower
 ratio. A loss of 69% or more of the added organic matter
 occurred in 2 years in every soil except that to which muck
 was added. Most of this loss occurred during the first 4
 months of the study. Since the experiment was set up in the
 greenhouse, decomposition proceeded faster than it does under
 most field conditions due to the higher temperature, but the
 same relative differences in the variously treated soils would
 probably be obtained in the field. Only 25% of the carbon and
 18% of the organic matter added in the form of straw applied
 at the rate of 20 tons of dry material per acre remained in
 the soil at the end of 2 years. Had the soil been growing a
 crop which would have utilized some of the nitrogen the
 results doubtless would have been lower. This shows the
 futility of attempting to build up soil organic matter by
 turning under straw or other low-nitrogen materials.
 
 
 73                                   NAL Call. No.: 79.9 W52R
 Effect of green manure on weed biomass.
 Bell, C.E.; Mayberry, K.S.
 S.l. : The Society; 1992.
 Research progress report - Western Society of Weed Science. p.
 VII/4; 1992. Meeting held on March 9-12, 1992, Salt Lake City,
 Utah.
 
 Language:  English
 
 Descriptors: California; Weed control; Biomass; Green manures
 
 
 74                               NAL Call. No.: 100 V81S no.6
 The effect of green manuring on soil nitrates under greenhouse
 conditions. Hill, Harry H.
 Blacksburg, Va. : Virginia Agricultural Experiment Station,;
 1915. p. 121-153 ; 24 cm. (Technical bulletin (Virginia
 Agricultural Experiment Station) ; 6.).  Cover title. 
 Bibliography: p. 152-153.
 
 Language:  English; English
 
 Descriptors: Green manuring; Soils
 
 
 75                              NAL Call. No.: 100 V81S no.73
 The effect of green-manure crops on certain properties of
 Berks silt loam.. Effect of green manure crops on certain
 properties of Berks silt loam Obenshain, S. S.; Gish, P. T.
 Blacksburg, Va. : Virginia Agricultural Experiment Station,;
 1941. 12 p. ; 24 cm. (Technical bulletin (Virginia
 Agricultural Experiment Station) ; 73.).  Cover title. 
 Bibliography: p. 11-12.
 
 Language:  English; English
 
 Descriptors: Silt loam; Green manuring
 
 
 76                                 NAL Call. No.: S541.5.M8S7
 Effect of hairy vetch, crimson clover, and rye cover crops on
 yield and quality of no-till flue-cured tobacco in North
 Carolina.
 Wiepke, T.; Worsham, A.D.; Lemons, R.W.
 Mississippi State : Mississippi Agricultural & Forestry
 Experiment Station; 1988 Aug.
 Special bulletin (88-1): p. 86-88; 1988 Aug.  In series
 analytic: Conservation farming: Focus on a better future
 /edited by K.H. Remy. Proceedings of the Southern Conservation
 Tillage Conference, August 10-12, 1988, Tupelo, Mississippi. 
 Includes references.
 
 Language:  English
 
 Descriptors: North Carolina; Nicotiana tabacum; Flue curing;
 No-tillage; Crop yield; Crop quality; Cover crops; Vicia
 villosa; Trifolium incarnatum; Secale cereale
 
 
 77                                   NAL Call. No.: S451.M9M9
 Effect of harvest management and nurse crop on production of
 five small-seeded legumes.
 Welty, L.E.; Westcott, M.P.; Prestbye, L.S.; Knox, M.L.
 Bozeman, Mont. : The Station; 1991.
 Montana agresearch - Montana Agricultural Experiment Station,
 Montana University v. 8 (1): p. 11-17; 1991.  Includes
 references.
 
 Language:  English
 
 Descriptors: Montana; Green manures; Trifolium alexandrinum;
 Medicago sativa; Trifolium resupinatum; Companion crops; Avena
 sativa; Harvesting; Management
 
 
 78                                   NAL Call. No.: S596.7.D4
 Effect of incorporated green manure crops on subsequent oat
 production in an acid, infertile silt loam.
 Warman, P.R.
 Dordrecht : Kluwer Academic Publishers; 1991.
 Developments in plant and soil sciences v. 45: p. 431-435;
 1991.  In the series analytic: Plant-Soil Interactions at Low
 pH / edited by R.J. Wright, V.C. Baligar and R.P. Murrmann.
 Proceedings of the Second International Symposium, June 24-29,
 1990, Beckley, West Virginia.  Includes references.
 
 Language:  English
 
 Descriptors: Acid soils; Silt loam soils; Green manures; Oryza
 sativa; Crop yield
 
 Abstract:  A field-size experiment was initiated in 1982 on an
 acid, low fertility Springhill silt loam to determine the
 effect of five unfertilized green manure crops (alsike clover,
 sweet clover, single- and double-cut red clover, and
 buckwheat) on subsequent oat production and soil fertility.
 The field was limed in 1982 and green manures were seeded
 (without fertilizer) in spring, 1983 in 1400 m2 strips
 randomly assigned within three treatment blocks. Plant tissue
 samples were taken from different locations in each plot in
 the fall of 1983 and all crops were incorporated. In 1984 the
 field was separated into an upper and lower section and each
 section received three rates of NPK fertilizer (0; 30-36-36;
 60-72-72 kg per ha-1) spread across the previous strips. Gary
 oats were seeded and at harvest were divided into grain and
 straw. The results indicated significant effects of field
 sample location, green manure type and fertilizer level on oat
 yields. Buckwheat significantly reduced oat production
 compared to the four clovers, while the highest fertilizer
 rate improved oat yields compared with the other levels of
 fertilizers. Elemental analysis of the green manure crops and
 soil fertility was compared with data of the same crops grown
 in more fertile, neutral soils.
 
 
 79                                 NAL Call. No.: QK898.N6N52
 Effect of incorporating plant materials on corn growth.
 Kaufusi, P.; Asghar, M.
 Bangkok, Thailand : Thailand Institute of Scientific and
 Technological Research; 1990 Aug.
 Nitrogen fixing tree research reports v. 8: p. 81-82; 1990
 Aug.  Includes references.
 
 Language:  English
 
 Descriptors: Zea mays; Leguminosae; Green manures; Soil
 fertility; Growth; Indicator plants; Plant nutrition
 
 
 80                                     NAL Call. No.: 4 AM34P
 The effect of other crops on tobacco.
 Jones, J.P.
 Madison, Wis. : American Society of Agronomy; 1929 Feb.
 Journal of the American Society of Agronomy v. 21 (2): p.
 118-129; 1929 Feb. Paper presented at the "Symposium on
 Tobacco Research", Nov. 23, 1928, Washington, D.C.  Includes
 references.
 
 Language:  English
 
 Descriptors: Maryland; Connecticut; Massachusetts; Ohio;
 Nicotiana tabacum; Crop yield; Crop quality; Rotations; Cover
 crops; Root rots
 
 
 81                                  NAL Call. No.: S539.5.A77
 Effect of tillage on soil water and alfalfa establishment in
 corn stubble. Stout, W.L.; Byers, R.A.; Bahler, C.C.; Hoffman,
 L.D.
 New York, N.Y. : Springer; 1990.
 Applied agricultural research v. 5 (3): p. 176-180; 1990. 
 Includes references.
 
 Language:  English
 
 Descriptors: Pennsylvania; Medicago sativa; Tillage; Soil
 water; Establishment; Maize stover; Soil water content; Secale
 cereale; No-tillage; Sowing date; Crop yield; Cover crops;
 Sowing depth
 
 Abstract:  The effect of soil water on alfalfa (Medicago
 sativa L.) seedling growth during no-till establishment into
 corn stubble has not been documented. Our objective was to
 determine the effects of differences in soil water levels
 resulting from different tillage methods and seeding dates on
 alfalfa emergence and seedling growth. The experiment was
 located at the Rock Spring Agricultural Research Center in
 Centre County, PA (40 degrees 42'N Lat., 77 degrees 57'W
 Long., elev. 365 m (1200 ft)), on a Hublersburg silt loam soil
 (clayey, mixed, mesic typic Hapludult) in 1986 and 1987 and a
 Hagerstown silt loam soil (fine, mixed, mesic Typic Hapludalf)
 in 1988. Alfalfa (cv. 'WL316') was drilled no-till into
 stubbles from corn harvested for grain (NT-G), silage (NT-S),
 or silage plus a rye (Secale cereale L. cv. common) cover crop
 (NT-SR), and seeded into a conventionally prepared seedbed
 resulting from corn harvested for grain (CT). Seeding dates
 were early April (EA), late April (LA), and mid-May (MM). Soil
 water content was not adversely affected by the inclusion of
 the rye cover crop in the NT-SR treatment. Good stands of over
 70% seedling frequency were obtained with all treatments, but
 the NT-S treatment had significantly higher seedling yields,
 yields at one-tenth bloom, and total seedling year yields than
 the others. Seedling yields were significantly lower in the
 NT-SR treatment, however rye silage yields made this treatment
 one of the most productive in the seedling year. In addition
 the rye cover crop of the NT-SR treatment provides a
 conservation cover during the winter and a means of capturing
 nitrate left over from the corn crop or mineralized during the
 early spring. In the first production year, there was no
 significant effect of tillage or seeding date on first harvest
 yields.
 
 
 82                                   NAL Call. No.: 56.8 J822
 Effectiveness of winter rye for accumulating residual
 fertilizer N following corn.
 Ditsch, D.C.; Alley, M.M.; Kelley, K.R.; Lei, Y.Z.
 Ankeny, Iowa : Soil and Water Conservation Society of America;
 1993 Mar. Journal of soil and water conservation v. 48 (2): p.
 125-132; 1993 Mar. Includes references.
 
 Language:  English
 
 Descriptors: Virginia; Secale cereale; Zea mays; Rotations;
 Ammonium sulfate; Application rates; Residual effects;
 Recovery; Nitrogen; Nutrient uptake; Cover crops; Losses from
 soil; Nitrate; Leaching; Dry matter accumulation; Nitrogen
 content
 
 
 83                                     NAL Call. No.: 80 AC82
 Effects of Bahia grass as a cover crop on the growth of mango
 trees, and soil fertility.
 Chang, M.T.
 Wageningen : International Society for Horticultural Science;
 1992 Jun. Acta horticulturae (292): p. 113-120; 1992 Jun.  In
 the series analytic: Recent advances in horticultural science
 in the tropics / edited by W.M.W. Othman, R. Mohamad, S.H.
 Ahmad, K.K. Chong. Meeting held on August 7-9, 1990,
 Universiti Pertanian Malaysia.  Includes references.
 
 Language:  English
 
 Descriptors: Taiwan; Mangifera indica; Orchards; Paspalum
 notatum; Cover crops; Erosion control; Sloping land; Grass
 clippings; Glomerella cingulata; Susceptibility
 
 
 84                             NAL Call. No.: 100 P381 no.493
 Effects of certain cultural treatments on orchard soil and
 water losses and on apple tree growth.
 Anthony, R. D.; Farris, N. F._1906-; Clarke, W. S.
 State College : Pennsylvania State College, School of
 Agriculture, Agricultural Experiment Station,; 1948.
 16 p. : ill. ; 22 cm. (Bulletin (Pennsylvania State College.
 Agricultural Experiment Station) ; 493.).  Cover title. 
 Bibliography: p. 16.
 
 Language:  English
 
 Descriptors: Apple; Apple; Cover crops
 
 
 85                                 NAL Call. No.: SB950.A2B74
 The effects of different green manure crops and tillage
 practices on pea root rots.
 Tu, J.C.; Findlay, W.I.
 Surrey : British Crop Protection Council; 1986.
 Brighton Crop Protection Conference-Pests and Diseases v. 1:
 p. 229-236; 1986.  Paper presented at the British Crop
 Protection Conference-- Pests and Diseases, November 17-20,
 1986, Brighton, England.  Includes references.
 
 Language:  English
 
 Descriptors: Pisum sativum; Fungal diseases; Root rots; Green
 manures; Tillage
 
 
 86                                      NAL Call. No.: S79.E3
 The effects of lay-by herbicides on wheat, vetch, and winter
 weeds as cover crops for cotton.
 Hurst, H.R.
 Mississippi State, Miss. : The Station; 1992 Jun.
 Bulletin - Mississippi Agricultural and Forestry Experiment
 Station (982): 6 p.; 1992 Jun.  Includes references.
 
 Language:  English
 
 Descriptors: Mississippi; Gossypium hirsutum; Triticum
 aestivum; Vicia sativa; Weeds; Herbicide residues; Cover
 crops; Adverse effects; Plant density
 
 
 87                              NAL Call. No.: 100 V81S no.53
 The effects of mulched and turned rye in the green and mature
 stages on the liberation of plant nutrients from a silt loam
 soil.
 Hill, H. H.
 Blacksburg, Va. : Virginia Agricultural Experiment Station,;
 1934. 18 p. ; 24 cm. (Technical bulletin (Virginia
 Agricultural Experiment Station) ; 53.).  Cover title. 
 Bibliography: p. 17-18.
 
 Language:  English
 
 Descriptors: Green manuring; Rye
 
 
 88                                     NAL Call. No.: 80 AC82
 Effects of permanent cover crop competition on sour cherry
 tree evaporation, growth and productivity.
 Anderson, J.L.; Bingham, G.E.; Hill, R.W.
 Wageningen : International Society for Horticultural Science;
 1992 Oct. Acta horticulturae (313): p. 135-142; 1992 Oct. 
 Paper presented at the Third International Symposium on
 Computer Modelling in Fruit Research and Orchard Management,
 February 11-14, 1992, Palmerston North, New Zealand.  Includes
 references.
 
 Language:  English
 
 Descriptors: Utah; Prunus cerasus; Orchards; Soil management;
 Cover crops; Plant competition; Growth rate; Crop yield;
 Transpiration; Rootstocks; Models
 
 
 89                                 NAL Call. No.: QL391.N4J62
 Effects of rapeseed and vetch as green manure crops and fallow
 on nematodes and soil-borne pathogens.
 Johnson, A.W.; Goldern, A.M.; Auld, D.L.; Sumner, D.R.
 Lake Alfred, Fla. : Society of Nematologists; 1992 Mar.
 Journal of nematology v. 24 (1): p. 117-126; 1992 Mar. 
 Includes references.
 
 Language:  English
 
 Descriptors: Brassica napus; Vicia villosa; Cucurbita pepo;
 Meloidogyne incognita; Meloidogyne javanica; Pythium;
 Rhizoctonia solani; Cropping systems
 
 Abstract:  In a rapeseed-squash cropping system, Meloidogyne
 incognita race 1 and M. javanica did not enter, feed, or
 reproduce in roots of seven rapeseed cultivars. Both nematode
 species reproduced at low levels on roots of the third crop of
 rapeseed. Reproduction of M. incognita and M. javanica was
 high on squash following rapeseed, hairy vetch, and fallow.
 The application of fenamiphos suppressed (P = 0.05) root-gall
 indices on squash following rapeseed, hairy vetch, and fallow;
 and on Dwarf Essex and Cascade rapeseed, but not Bridger and
 Humus rapeseed in 1987. The incorporation of 30-61 mt/ha green
 biomass of rapeseed into the soil 6 months after planting did
 not affect the population densities of Criconemella ornata, M.
 incognita, M. javanica, Pythium spp., Rhizoctonia solani AG-4;
 nor did it consistently increase yield of squash. Hairy vetch
 supported larger numbers of M. incognita and M. javanica than
 rapeseed cultivars or fallow. Meloidogyne incognita and M.
 javanica survived in fallow plots in the absence of a host
 from October to May each year at a level sufficient to warrant
 the use of a nematicide to manage nematodes on the following
 susceptible crop.
 
 
 90                              NAL Call. No.: 100 V81S no.83
 The effects of rye, lespedeza, and cowpeas when used as cover
 crops and incorporated with the soil on the leachings from
 Dunmore silt loam soil. Hill, H. H.
 Blacksburg, Va. : Virginia Agricultural Experiment Station,;
 1943. 16 p. ; 24 cm. (Technical bulletin (Virginia
 Agricultural Experiment Station) ; 83.).  Cover title. 
 Bibliography: p. 16.
 
 Language:  English
 
 Descriptors: Silt loam; Cover crops
 
 
 91                             NAL Call. No.: 100 T25S no.100
 Effects of several winter cover crops on the yield of cotton.
 Hazlewood, Ben P.; Chapman, E. J.
 Knoxville : University of Tennessee, Agricultural Experiment
 Station,; 1948. [4] p. : ill. ; 23 cm. (Circular (University
 of Tennessee (Knoxville campus). Agricultural Experiment
 Station) ; no. 100.).  Cover title.
 
 Language:  English; English
 
 Descriptors: Cotton; Cover crops
 
 
 92                                    NAL Call. No.: 421 J822
 Effects of summer cover crop management on wireworm
 (Coleoptera: Elateridae) abundance and damage to potato.
 Jansson, R.K.; Lecrone, S.H.
 Lanham, Md. : Entomological Society of America; 1991 Apr.
 Journal of economic entomology v. 84 (2): p. 581-586; 1991
 Apr.  Includes references.
 
 Language:  English
 
 Descriptors: Florida; Solanum tuberosum; Cover crops; Crop
 damage; Conoderus; Conoderus falli; Melanotus communis;
 Incidence; Cultural control; Insect control; Tubers; Crop
 losses; Crop yield
 
 Abstract:  The effects of planting date and mowing interval of
 the summer cover crop consisting of a sorghum-sudangrass
 hybrid on the abundance of wireworms, Melanotus communis
 (Gyllenhal), Conoderus rudis (Brown), C. amplicollis
 (Gyllenhal), and C. falli Lane, and subsequent damage to
 tubers in the following potato crop were investigated during
 two consecutive growing seasons in southern Florida. Eight
 summer cover crop management programs were evaluated: cover
 crop planted early (within 38 d after potato harvest) and late
 (75-89 d after harvest) and mowed at 3-, 6-, or 9-wk
 intervals; cover crop planted early and not mowed (standard
 summer management program); and mechanical fallow. In both
 years, planting date affected wireworm abundance and damage to
 potato. In the 1st yr, wireworm larvae were 14.2-33.7 and
 19-45 times more abundant in plots planted with early cover
 crop than in those planted with late cover crop and in those
 fallowed, respectively. Wireworms were 1.3-2.0 times more
 abundant in plots planted with late cover crop than in plots
 mechanically fallowed. Similar results were found during the
 2nd yr. Mowing interval did not consistently affect wireworm
 abundance. Wireworm damage to potato tubers was affected by
 planting date. Percentages of wireworm injury and damage to
 tubers were 6.6-9.6 and 1.8-6.7 times greater in potatoes that
 followed early-planted cover crops than in those that followed
 late-planted cover crops or mechanical fallow in the first and
 second year, respectively. Crop loss due to wireworms was
 $1,808-$2,084 and $1,298-$3,386 per hectare higher in plots
 planted with early cover crop than in those planted with late
 cover crop in the first and second year, respectively. Thus,
 delaying the planting date of the summer cover crop resulted
 in a reduction in wireworm abundance and associated crop loss
 in the following potato crop.
 
 
 93                                   NAL Call. No.: 79.9 C122
 Effects of weeds and cover crops on vertebrate pest damage.
 Timm, R.M.
 Fremont, Calif. : California Weed Conference; 1990.
 Proceedings - California Weed Conference (42): p. 190-195;
 1990.  Meeting held January 15-17, 1990, San Jose, California. 
 Includes references.
 
 Language:  English
 
 Descriptors: Crop damage; Vertebrate pests; Cover crops;
 Weeds; Environmental factors
 
 
 94                                    NAL Call. No.: SB249.N6
 Effects of winter cover crops on cotton yield and selected
 soil properties. Keisling, T.C.; Scott, H.D.; Waddle, B.A.;
 Williams, W.; Frans, R.E. Memphis, Tenn. : National Cotton
 Council of America; 1990. Proceedings - Beltwide Cotton
 Production Research Conferences. p. 492-496; 1990.  Meeting
 held January 9-14, 1990, Las Vegas, Nevada.  Includes
 references.
 
 Language:  English
 
 Descriptors: Gossypium hirsutum; Cover crops; Secale cereale;
 Vicia villosa; Lupinus albus; Trifolium incarnatum; Crop
 yield; Soil physical properties
 
 
 95                                 NAL Call. No.: QK898.N6N52
 Enhanced grass growth below canopy of Albizia lebbeck.
 Lowry, J.B.; Lowry, J.B.C.; Jones, R.
 Bangkok, Thailand : Thailand Institute of Scientific and
 Technological Research; 1988 May.
 Nitrogen fixing tree research reports v. 6: p. 45-46; 1988
 May.  Includes references.
 
 Language:  English
 
 Descriptors: Australia; Albizia lebbek; Panicum maximum;
 Heteropogon contortus; Canopy; Cover crops; Growth; Crop
 production; Grazing effects; Plant ecology
 
 
 96                                 NAL Call. No.: 290.9 AM32P
 Establishing fall rye as a cover crop after potatoes.
 Edwards, L.M.; Hergert, G.B.
 St. Joseph, Mich. : The Society; 1989.
 Paper - American Society of Agricultural Engineers (89-1094):
 18 p.; 1989. Paper presented at the 1989 International Summer
 Meeting held June 25-28, 1989, Quebec, Canada.  Includes
 references.
 
 Language:  English
 
 Descriptors: Solanum tuberosum; Ergotism; Cover crops;
 Pregermination; Seeding; Seed treatment; Potato diggers;
 Potato harvesters; Seed dispersal
 
 
 97                                NAL Call. No.: S544.3.N7N45
 Establishing legume cover crops in a small grain/corn
 rotation. DeGolyer, B.
 Belmont, N.Y. : Cooperative Extension Association of Allegany
 County; 1989 Oct.
 News and views v. 74 (10): p. 3-4; 1989 Oct.
 
 Language:  English
 
 Descriptors: Leguminosae; Cover crops; Zea mays; Grain crops;
 Rotations
 
 
 98                                  NAL Call. No.: QH84.8.B46
 Estimating N2 fixation by Sesbania rostrata and S. cannabina
 (syn. S. aculeata) in lowland rice soil by the 15N dilution
 method. Pareek, R.P.; Ladha, J.K.; Watanbe, I.
 Berlin : Springer International; 1990.
 Biology and fertility of soils v. 10 (2): p. 77-88; 1990. 
 Includes references.
 
 Language:  English
 
 Descriptors: Philippines; Sesbania; Sesbania cannabina; Green
 manures; Isotope labeling; Nitrogen; Nitrogen fixation; Paddy
 soils; Soil fertility; Tropics; Mathematical models; Field
 tests
 
 
 99                                  NAL Call. No.: S539.5.J68
 Ethephon use on soybean cultivars to enhance establishment of
 underseeded cover crops.
 Moomaw, R.S.; Echtenkamp, G.W.
 Madison, Wis. : American Society of Agronomy; 1991 Apr.
 Journal of production agriculture v. 4 (2): p. 250-255; 1991
 Apr.  Includes references.
 
 Language:  English
 
 Descriptors: Nebraska; Ethephon; Application rates; Glycine
 max; Cultivars; Crop growth stage; Crop yield; Plant height;
 Maturity; Canopy; Light transmission; Crop establishment;
 Cover crops; Undersowing; Interplanting; Zea mays; Rotations
 
 
 100                                    NAL Call. No.: 4 AM34P
 Evaluation of the nitrogen submodel of CERES-maize following
 legume green manure incorporation.
 Bowen, W.T.; Jones, J.W.; Carsky, R.J.; Quintana, J.O.
 Madison, Wis. : American Society of Agronomy; 1993 Jan.
 Agronomy journal v. 85 (1): p. 153-159; 1993 Jan.  Includes
 references.
 
 Language:  English
 
 Descriptors: Simulation models; Prediction; Nutrient uptake;
 Nitrogen; Green manures; Nutrient availability;
 Mineralization; Leaching; Nitrate; Losses from soil; Nitrogen
 balance
 
 Abstract:  Crop simulation models that accurately predict the
 availability of N from decomposing plant residues would
 provide a powerful tool for evaluating legume green manures as
 potential N sources for nonlegume crops. Using measured data
 from a series of field experiments conducted on an Oxisol in
 central Brazil, we conducted this study to test the N submodel
 of CERES-Maize for its ability to simulate N mineralization,
 nitrate leaching, and N uptake by maize (Zea Mays L.)
 following the incorporation of 10 different legume green
 manures. Legume or weed residue N at the time of incorporation
 varied from 25 to 300 kg ha-1 with C/N ratios varying from 13
 to 37. Comparison of predicted and measured accumulation of
 inorganic N in uncropped soil showed that the model usually
 provided a realistic simulation of legume N release, although
 N release was overpredicted for some legumes. For all legumes,
 both simulated and measured data showed that about 60% of the
 organic N applied was recovered as inorganic N within 120 to
 150 d after incorporation. To realistically simulate N
 availability when rainfall was excessive, we modified the
 model to account for delayed leaching due to nitrate retention
 in the subsoil. Nitrogen uptake by maize was generally
 overpredicted at high levels of available N. The N submodel
 was shown to realistically simulate legume N release, but
 further work is needed to determine the importance of subsoil
 nitrate retention in other soils and how best such retention
 might be described in the model.
 
 
 101                         NAL Call. No.: 100 N48 (2) no.691
 Experiments in orchard soil management fertilizers, mulches,
 and cover crops. Collison, R. C.
 Geneva, N.Y. : New York State Agricultural Experiment
 Station,; 1940. 37 p. ; 23 cm. (Bulletin (New York State
 Agricultural Experiment Station) ; no. 691.).  Cover title.
 
 Language:  English
 
 Descriptors: Apple
 
 
 102                        NAL Call. No.: 100 N48C (1) no.677
 Experiments with cover crops on Long Island.
 Wessels, P. H.; Hartman, John Daniel,
 Ithaca, N.Y. : Cornell University Agricultural Experiment
 Station,; 1937. 27 p. : ill. ; 23 cm. (Bulletin (Cornell
 University. Agricultural Experiment Station) ; 677.). 
 Bibliography: p. 27.
 
 Language:  English; English
 
 Descriptors: Cover crops
 
 
 103                                 NAL Call. No.: S605.5.A43
 Farm program impacts on incentives for greenmanure rotations.
 Young, D.L.; Painter, K.M.
 Greenbelt, Md. : Institute for Alternative Agriculture; 1990.
 American journal of alternative agriculture v. 5 (3): p.
 99-105; 1990. Includes references.
 
 Language:  English
 
 Descriptors: Alternative farming; Sustainability; Rotations;
 Green manures; Agricultural policy; Legislation; Economic
 analysis; Profitability; Costs; Returns; Seasonal variation;
 Incentives
 
 Abstract:  Farm programs influence the profitability of a crop
 rotation through five effects: (1) a deficiency payment (DP)
 effect, (2) an acreage reduction (ARP) effect, (3) a base
 effect, (4) a crop price effect, and (5) a risk reduction
 effect. This study initially examines ARP and DP effects of
 the 1985 Farm Bill on the relative profitability Of a low-
 input rotation and a grain-intensive conventional rotation in
 Washington state over 1986-1990. In years of low deficiency
 payments or high foregone returns from ARP land, the low-input
 green manure rotation was competitive with the conventional
 rotation but lost its advantage in years of low ARP costs or
 high deficiency payments. Long-run incentives to maintain
 wheat base introduced a consistent bias against the low-input
 green manure rotation. Planting flexibility options proposed
 during the 1990 Farm Bill debate could reduce farm program
 barriers to green manure and other low-input rotations. The
 Bush Administration's Normal Crop Acreage (NCA) proposal,
 which was not accepted in the 1990 legislation, would have
 largely eliminated base erosion for the green manure rotation
 in this study. More importantly, non-ARP green manure acreage
 would have qualified for deficiency payments under the NCA,
 thereby sharply increasing the low-input rotation's relative
 profitability. Proposals like the NCA might receive further
 attention in the future due to environmental concerns, fiscal
 pressures, or possible trade agreements requiring multilateral
 phaseout of agricultural subsidies coupled to commodities.
 
 
 104                             NAL Call. No.: 100 G29S no.27
 Fertilizer, culture and variety experiments on corn ;
 Fertilizer and variety tests on cotton ; Green manuring with
 cow peas..  Fertilizer and variety tests on cotton Green
 manuring with cow peas
 Redding, R. J.
 Experiment, Ga. : Georgia Experiment Station, 1894; 1894. p.
 [187]-216 ; 23 cm. (Bulletin (Georgia Experiment Station) ;
 no. 27.). Cover title.
 
 Language:  English; English
 
 Descriptors: Corn; Cotton; Cowpea
 
 
 105                        NAL Call. No.: 100 C125 (2) no.354
 Fertilizers and covercrops for California deciduous orchards.. 
 Fertilizers and cover crops for California deciduous orchards
 Proebsting, Edward Louis,
 Berkeley, Calif. : University of California, College of
 Agriculture, Agricultural Experiment Station,; 1943.
 15 p. ; 22 cm. (Circular (California Agricultural Experiment
 Station) ; 354.).  Caption title.  At head of title:
 University of California. College of Agriculture. Agricultural
 Experiment Station, Berkeley, California.
 
 Language:  English; English
 
 Descriptors: Cover crops; Fruit
 
 
 106                        NAL Call. No.: 100 C125 (2) no.466
 Fertilizers and covercrops for California orchards.
 Proebsting, Edward Louis,
 Berkeley, Calif. : Division of Agricultural Sciences,
 University of California,; 1958.
 19 p. : ill. (some col.) ; 23 cm. (Circular (California
 Agricultural Experiment Station) ; 466.).
 
 Language:  English
 
 Descriptors: Fruit; Cover crops
 
 
 107                                    NAL Call. No.: 4 AM34P
 The fertilizing value of green manures rotted under different
 conditions. Daji, J.A.
 Madison, Wis. : American Society of Agronomy; 1934 Jun.
 Journal of the American Society of Agronomy v. 26 (6): p.
 466-474; 1934 Jun. Includes references.
 
 Language:  English
 
 Descriptors: England; Hordeum vulgare; Vicia; Brassica; Beta
 vulgaris; Green manures; Chemical composition; Organic matter;
 Iron oxides; Aluminum oxide; Lime; Calcium oxide; Magnesium
 oxide; Potassium; Phosphoric acid; Nitrogen; Composting;
 Nitrogen content; Seed germination; Crop yield; Nutrient
 availability; Plant height; Shoots; Tillering; Fertilizers
 
 Abstract:  1. Young tares, young mustard, and sugar beet tops
 had a beneficial effect on the barley crop when used as green
 manures. They accelerated germination, increased the tillering
 capacity, and gave bigger yields of grain and straw than the
 control. This was true of all three manures in whatever way
 they were applied. The same applies to the artificial
 fertilizers. 2. The yield of grain and straw was correlated
 with the tillering capacity, but was not affected by the
 height. The increased tillering and yield were primarily due
 to the fertilizing elements contained in the green manures,
 chiefly the nitrogen. 3. The green manures when buried at once
 gave higher yields of grain and straw than when they were
 applied to the surface or when they were rotted separately. 4.
 The fertilizing value of the different methods of applying the
 green manures depends on the abundance of available nitrogen
 returned the treated manure for the use of the crop. The
 extent to which the abundance of nitrogen will be maintained
 in the treated manure depends on the nature of the green
 manure, the amount and nature of nitrogen originally present
 in the green manure, and the conditions under which the
 material is decomposed.
 
 
 108                                 NAL Call. No.: S539.5.J68
 Forage legume-small grain intercrops: nitrogen production and
 response of subsequent corn.
 Hesterman, O.B.; Griffin, T.S.; Williams, P.T.; Harris, G.H.;
 Christenson, D.R.
 Madison, Wis. : American Society of Agronomy; 1992 Jul.
 Journal of production agriculture v. 5 (3): p. 340-348; 1992
 Jul.  Includes references.
 
 Language:  English
 
 Descriptors: Michigan; Triticum aestivum; Winter wheat; Avena
 sativa; Zea mays; Medicago sativa; Trifolium pratense; Cover
 crops; Intercropping; Crop yield; Sowing; Nitrogen; Soil
 fertility; Available water; Spatial variation; Geographical
 distribution; Precipitation; Seasonal variation
 
 
 109                                   NAL Call. No.: 421 J822
 Foraging preference of red imported fire ants (Hymenoptera:
 Formicidae) among three species of summer cover crops and
 their extracts.
 Kaakeh, W.; Dutcher, J.D.
 Lanham, Md. : Entomological Society of America; 1992 Apr.
 Journal of economic entomology v. 85 (2): p. 389-394; 1992
 Apr.  Includes references.
 
 Language:  English
 
 Descriptors: Indigofera hirsuta; Sesbania exaltata; Vigna
 unguiculata; Insect repellents; Plant extracts; Solenopsis
 invicta; Feeding preferences; Foraging
 
 Abstract:  Foraging preference of red imported fire ant,
 Solenopsis invicta Buren, among three species of summer cover
 crops, sesbania, Sesbania exaltata (Rafinesque-Schmaltz) Cory;
 hairy indigo, Indigofera hirsuta L.; and cowpea, Vigna
 unguiculata (L.) Walpers, was evaluated in the greenhouse
 using choice and no-choice tests. Ants derived a large part of
 their nutrients from aphid honeydew, and ant workers differed
 in their response to plant species in the presence or absence
 of cowpea aphid. Ants preferred cowpea > indigo > sesbania
 when these plants were infested with cowpea aphids, whereas
 ants showed no preference between cowpea and indigo when
 plants were kept free of cowpea aphids. Sesbania showed almost
 100% repellency, to ants for 8 d, whether these plants were
 infested or kept free of aphids. In a pickup bioassay for
 detecting any discrimination among plants by ants, leaf disks
 from noninfested leaves of cowpea and hairy indigo were picked
 up more readily than those from sesbania. Response of ants to
 extracts differed significantly among plants. Sesbania extract
 repelled and caused mortality in the red imported fire ant.
 Ethanol extract of sesbania caused higher ant mortality than
 the water extract.
 
 
 110                                    NAL Call. No.: 26 T754
 Grain yield responses in rice to eight tropical green manures.
 Meelu, O.P.; Morris, R.A.; Furoc, R.E.; Dizon, M.A.
 London : Butterworth-Heinemann; 1992 Apr.
 Tropical agriculture v. 69 (2): p. 133-136; 1992 Apr. 
 Includes references.
 
 Language:  English
 
 Descriptors: Philippines; Oryza sativa; Sesbania cannabina;
 Crotalaria juncea; Green manures; Legumes; Nitrogen
 fertilizers; Biomass production; Crop yield
 
 
 111                                  NAL Call. No.: SB193.F59
 Grazing management of overseeded ryegrass.
 Alison, M.W.
 Georgetown, Tx. : American Forage and Grassland Council; 1992.
 Proceedings of the Forage and Grassland Conference v. 1: p.
 55-59; 1992. Includes references.
 
 Language:  English
 
 Descriptors: Louisiana; Lolium multiflorum; Oversowing;
 Grazing systems
 
 
 112                                 NAL Call. No.: S540.A2F62
 Green manure cropping systems and benefits.
 Gallaher, R.N.; Eylands, V.J.
 Gainesville, Fla. : The Stations; 1985.
 Agronomy research report AY - Agricultural Experiment
 Stations, University of Florida (85-11): 14 p.; 1985. 
 Includes references.
 
 Language:  English
 
 Descriptors: Florida; Green manures; Cropping systems
 
 
 113                                 NAL Call. No.: S667.R5G73
 Green manure in rice farming proceedings of a symposium on
 sustainable agriculture : the role of green manure crops in
 rice farming systems, 25-29 May 1987..  Role of green manure
 crops in rice farming systems Sustainable agriculture, green
 manure in rice farming
 International Rice Research Institute, International Council
 of Scientific Unions, Commission on the Application of Science
 to Agriculture, Forestry, and Aquaculture
 S.l. : International Rice Research Institute, in collaboration
 with the Commission on the Application of Science to
 Agriculture, Forestry, and Aquaculture,; 1988.
 379 p. : ill. ; 23 cm.  Cover title: Sustainable agriculture,
 green manure in rice farming.  Includes bibliographical
 references.
 
 Language:  English
 
 Descriptors: Green manure crops; Rice
 
 
 114                                  NAL Call. No.: aZ5071.N3
 Green manures and cover crops--January 1987-September 1991.
 Gates, J.P.
 Beltsville, Md. : The Library; 1991 Dec.
 Quick bibliography series - U.S. Department of Agriculture,
 National Agricultural Library (U.S.). (92-11): 60 p.; 1991
 Dec.  Updates QB 89-58. Bibliography.
 
 Language:  English
 
 Descriptors: Green manures; Cover crops; Bibliographies
 
 
 115                            NAL Call. No.: S605.5.I45 1989
 Green manures in irrigated crop systems.
 Razongles, C.
 Witzenhausen? : Ekopan; 1990.
 Agricultural alternatives and nutritional self-sufficiency :
 for a sustainable agricultural system that respects man and
 his environment : proc of the IFOAM Seventh Int Scientific
 Conference, Ouagadougou, January 2-5, 1989. p. 255-262; 1990.
 
 Language:  English
 
 Descriptors: Organic farming; Cropping systems; Green manures;
 Irrigation; Environmental impact; Temporal variation; Seasonal
 growth; Seasons; Residual effects; Nitrates; Crop yield
 
 
 116                                    NAL Call. No.: 4 AM34P
 Green manuring and its application to agricultural practices.
 Pieters, A.J.; McKee, R.
 Madison, Wis. : American Society of Agronomy; 1929 Oct.
 Journal of the American Society of Agronomy v. 21 (10): p.
 985-993; 1929 Oct. Paper presented at the "Symposium on Soil
 Organic Matter and Green Manuring," November 22, 1928,
 Washington, D.C.  Includes references.
 
 Language:  English
 
 Descriptors: Crop production; Green manures; Crop yield
 
 
 117                              NAL Call. No.: 100 Io9 no.10
 Green manuring and soil fertility.
 Brown, P. E.
 Ames, Iowa : Agricultural Experiment Station, Iowa State
 College of Agriculture and Mechanic Arts,; 1913.
 15 p. : ill. ; 22 cm. (Circular (Iowa State College.
 Agricultural Experiment Station) ; no. 10.).
 
 Language:  English
 
 Descriptors: Green manuring
 
 
 118                        NAL Call. No.: 100 C125 (2) no.110
 Green manuring in California.
 Lipman, C. B.
 Berkeley, Calif. : University of California, College of
 Agriculture, Agricultural Experiment Station,; 1913.
 3 p. ; 22 cm. (Circular (California Agricultural Experiment
 Station) ; no. 110.).
 
 Language:  English; English
 
 Descriptors: Green manuring
 
 
 119                              NAL Call. No.: S661.P53 1927
 Green manuring principles and practice.
 Pieters, Adrian John,
 New York : Wiley ; London : Chapman & Hall,; 1927.
 xiv, 356 p. : ill. ; 24 cm. (The Wiley agricultural series). 
 Includes bibliograpical references (p. 325-340).
 
 Language:  English
 
 Descriptors: Green manuring
 
 
 120                            NAL Call. No.: S661.S3413 1989
 Green manuring principles and practice of natural soil
 improvement.. Bedeutung, Praxis und Technik der Grundungung in
 Landwirtschaft und Gemusebau, Rev. 3rd ed..
 Schmid, Otto; Klay, Ruedi; Brinton, William F.
 Woods End Agricultural Institute
 Mt. Vernon, Me. : Woods End Agricultural Institute,; 1989. v,
 51 p. ; 28 cm.  "This document prepared by W.F. Brinton from
 original reports which appeared in part under the title
 'Bedeutung, Praxis und Technik der Grundungung in
 Landwirtschaft und Gemusebau,' 1979, 1980. von O. Schmid u. R.
 Klay"--T.p. verso.  Includes bibliographical references (p.
 47-51).
 
 Language:  English
 
 Descriptors: Green manuring
 
 
 121                            NAL Call. No.: 100 M36S no.268
 Green-manuring crops for soil improvement Branchville field.. 
 Green manuring crops for soil improvement
 McCall, A. G.
 College Park : University of Maryland, Agricultural Experiment
 Station,; 1924. 12 p. : ill. ; 23 cm. (Bulletin (Maryland
 Agricultural Experiment Station) ; no. 268.).  Caption title. 
 July, 1924.
 
 Language:  English
 
 Descriptors: Green manuring
 
 
 122                                NAL Call. No.: S592.7.A1S6
 Growth and N2-fixation of two stem-nodulating legumes and
 their effect as green manure on lowland rice.
 Becker, M.; Ladha, J.K; Ottow, J.C.G.
 Exeter : Pergamon Press; 1990.
 Soil biology and biochemistry v. 22 (8): p. 1109-1119; 1990. 
 Includes references.
 
 Language:  English
 
 Descriptors: Sesbania; Aeschynomene; Growth rate; Nitrogen
 fixation; Stem nodules; Green manures; Lowland areas; Oryza
 sativa
 
 
 123                                  NAL Call. No.: QK867.J67
 Growth and selenium uptake of range plants propagated in
 uranium mine soils. Hossner, L.R.; Woodard, H.J.; Bush, J.
 New York, N.Y. : Marcel Dekker; 1992.
 Journal of plant nutrition v. 15 (12): p. 2743-2761; 1992. 
 Includes references.
 
 Language:  English
 
 Descriptors: Texas; Panicum coloratum; Cynodon dactylon;
 Gramineae; Selenium; Ion uptake; Mineral content; Uranium;
 Mine spoil; Shoots; Dry matter accumulation; Cover crops
 
 Abstract:  High soil selenium (Se) levels have been found in
 association with uranium deposits in Texas. A concern that
 high Se concentrations may be found in forages grown on
 reclaimed mine lands prompted this investigation. A native
 soil sampled near the mining area, and overburden materials
 sampled from two Se enriched uranium mine soil sites were
 compared in a plant growth study in the greenhouse. Shoot
 yields and shoot Se concentration in each of ten grasses
 common to the region were determined from plants harvested
 three weeks after germination and from shoot regrowth
 harvested four weeks after the first harvest. Shoot weights
 were reduced for 5 of the 10 species growing in soils with
 medium and high Se status. Total shoot weights of Cynodon
 dactylon and Panicum coloratum from two harvests were
 consistently highest in all soil materials and are highly
 recommended for use as a stabilizing cover crop for lands
 disturbed from uranium mining. Generally, no correlation was
 observed between shoot weight and plant Se concentration or
 uptake in the 10 species. However, plant tissue Se
 concentrations in all species for at least one of the two
 harvest dates were above the 5 mg kg-1 concentration
 considered potentially harmful to grazing livestock.
 Therefore, none of these species would be a suitable forage
 for livestock grazing on reclaimed Se-enriched uranium mining
 overburden.
 
 
 124                                   NAL Call. No.: 56.9 SO3
 Growth characteristics of legume cover crops in a semiarid
 environment. Power, J.F.
 Madison, Wis. : The Society; 1991 Nov.
 Soil Science Society of America journal v. 55 (6): p.
 1659-1663; 1991 Nov. Includes references.
 
 Language:  English
 
 Descriptors: North Dakota; Legumes; Cover crops; Green
 manures; Semiarid climate; Seasonal growth; Planting date;
 Temporal variation; Stand characteristics; Growth rate; Dry
 matter accumulation; Nitrogen fixation; Nitrogen; Nutrient
 uptake; Water use efficiency; Nitrogen content; Climatic
 factors; Precipitation; Dry farming
 
 Abstract:  To select the best legume cover crop to grow for a
 given cropping situation, the producer needs knowledge of
 relative growth rates, N2-fixation and N-uptake rates, and
 water use for various potential planting dates. Such an
 experiment was conducted for 2 yr at Mandan, ND, in which 10
 legume species were planted on or shortly after the first day
 of May, June, July, and August each year. Soil and plant
 samples were collected periodically after each planting date
 to evaluate rates of dry-matter production, N accumulation,
 and water use. Potential N2-fixation rate was measured in one
 season only. For the first 40 to 90 d after planting, large-
 seeded annuals such as faba bean (Vicia faba L.) field pea
 (Pisum sativum L.), and soybean (Glycine max [L] Merr.)
 generally exhibited most rapid growth, N accumulation, and
 water use (these three parameters were generally closely
 related for all samplings). With more than 90 d growth,
 species such as Korean lespedeza (Lespedeza stipulacea
 Maxim.), yellow sweet clover (Melilotus officianalis L.), and
 alfalfa (Medicago sativa L.) also began to exhibit rapid
 growth. One surprising result was the outstanding growth of
 May-planted subterranean clover (Trifolium subterraneum L.) in
 one (ample moisture) of the two seasons. For the shorter
 growth periods, faba bean exhibited good growth
 characteristics at all planting dates, and field pea was
 satisfactory at most. July and August planting of slower
 growing species generally resulted in relatively little growth
 by the end of the season. In most instances, water-use
 efficiency was greatest for the May planting, and highest
 values were often recorded for field pea, faba bean, and
 subterranean clover. These results identify those legume
 species best adapted for a given planting date and duration of
 growth under the climatic conditions of this experiment.
 
 
 125                                    NAL Call. No.: 4 AM34P
 Harvest management of a crimson clover cover for no-tillage
 corn production. Holderbaum, J.F.; Decker, A.M.; Meisinger,
 J.J.; Mulford, F.R.; Vough, L.R. Madison, Wis. : American
 Society of Agronomy; 1990 Sep.
 Agronomy journal v. 82 (5): p. 918-923; 1990 Sep.  Includes
 references.
 
 Language:  English
 
 Descriptors: Maryland; Zea mays; No-tillage; Trifolium
 incarnatum; Cover crops; Crop yield; Grain; Maize silage;
 Herbage; Nitrogen content; Dry matter accumulation; Nitrogen;
 Residual effects; Nutrient uptake; Forage; Cutting frequency;
 Crop quality; Sequential cropping
 
 Abstract:  Legume cover crops are valuable N sources for no-
 tillage corn (Zea mays L.). However, little research has been
 done in assessing the management options for legume cover
 crops. Field studies were conducted on a Coastal Plain
 Matapeake silt loam soil (fine-silty, mixed, mesic Typic
 Hapludult) from 1983 through 1986 to determine the effects of
 various harvest management schedules on total N contribution
 of legume cover crops, subsequent corn grain and silage
 yields, and total forage (combined cover crop and corn
 herbage) production. A crimson clover (Trifolium incarnatum
 L.) cover crop was subjected to no harvest; spring silage
 harvest with clippings removed (spring silage); and simulated
 pasture harvests with clippings from multiple harvests removed
 (pasture removed) or returned (pasture returned). A no-cover
 control treatment was also included. No-tillage corn was grown
 in the cover crop residues and two fertilizer N (FN) rates (0
 and 90 kg ha-1) were applied in a split-block design to each
 harvest management treatment. Averaged over 3 yr, multiple
 harvests of the cover crop vs. a spring silage harvest
 resulted in lower cover crop herbage yields (3.0 vs. 4.7 Mg
 ha-1) and total N content (114 vs. 146 kg N ha-1) for the
 multiple harvests. Corn grain and silage yields and corn N
 uptake were consistently higher following crimson clover cover
 than for no cover, regardless of harvest management, and were
 generally higher when the cover was left in place than
 following removal of the cover. There were FN responses
 regardless of harvest management treatment. The reduction in
 corn silage yield when the cover crop was harvested and
 removed was less than the cover crop herbage dry matter yield,
 resulting in greater total forage production when the cover
 crop was harvested as forage. Results suggest that harvest
 management options of a crimson clover cover crop offer
 flexibility in either optimizing subsequent corn grain yields
 or total forage production for no-tillage croppin
 
 
 126                                  NAL Call. No.: 100 M69MI
 Horticulture's Garner honored.
 Kight, T.
 Mississippi State, Miss. : The Station; 1991 Apr.
 MAFES research highlights - Mississippi Agricultural and
 Forestry Experiment Station v. 54 (4): p. 3; 1991 Apr.
 
 Language:  English
 
 Descriptors: Mississippi; Cover crops; Green manures
 
 
 127                                     NAL Call. No.: S1.N32
 How to choose a soil-building legume.
 Sarrantonio, M.
 Emmaus, Pa. : Rodale Institute; 1991 Jul.
 The New farm. p. 23-25; 1991 Jul.  Paper presented at a Rodale
 Institute "Take Charge" workshop, Winter, 1990, Kutztown,
 Pennsylvania.
 
 Language:  English
 
 Descriptors: Leguminosae; Cover crops
 
 
 128                                NAL Call. No.: 275.29 M58B
 How to control sheet and rill erosion.
 East Lansing, Mich. : The Service; 1991 Oct.
 Extension bulletin E - Cooperative Extension Service, Michigan
 State University (2315): 4 p.; 1991 Oct.
 
 Language:  English
 
 Descriptors: Erosion control; Erosion; Rill erosion; Contour
 cultivation; Contour ridging; Cover crops; Rotations; Terraces
 
 
 129                               NAL Call. No.: SB950.2.I3I4
 How will cover crops affect insect ecology?.
 Steffey, K.
 Urbana, Ill. : Cooperative Extension Service, Univ of Illinois
 at Urbana-Champaign; 1991.
 Illinois Agricultural Pesticides Conference summaries of
 presentations January 8, 9, 10, 1991, Urbana, Illinois / Univ
 of Illinois at Urbana-Champaign, Coop Ext Serv, in coop with
 the Illinois Natural History Survey. p. 108-111; 1991.
 "Proceedings of the 1991 Illinois Agricultural Pesticides
 Conference," January 8-10, 1991, Urbana, Illinois.  Includes
 references.
 
 Language:  English
 
 Descriptors: Illinois; Cover crops; Insects; Ecology
 
 
 130                                   NAL Call. No.: SB249.N6
 Impact of legume cover crops on soilborne plant pathogens of
 cotton. Rothrock, C.S.; Kirkpatrick, T.L.
 Memphis, Tenn. : National Cotton Council of America; 1990.
 Proceedings - Beltwide Cotton Production Research Conferences.
 p. 30-31; 1990.  Meeting held January 9-14, 1990, Las Vegas,
 Nevada.  Includes references.
 
 Language:  English
 
 Descriptors: Gossypium hirsutum; Cover crops; Fungus control;
 Rhizoctonia solani; Thielaviopsis basicola
 
 
 131                                  NAL Call. No.: 79.9 C122
 Impact of nematode species and various cover crops on growth
 of adjacent grapevines.
 McKenry, M.V.; Buzo, T.; Kaku, S.
 Fremont, Calif. : California Weed Conference; 1990.
 Proceedings - California Weed Conference (42): p. 187-189;
 1990.  Meeting held January 15-17, 1990, San Jose, California.
 
 Language:  English
 
 Descriptors: Vitis; Ground cover; Weeds; Cover crops; Plant
 parasitic nematodes
 
 
 132                                  NAL Call. No.: 99.9 SO82
 The impact of weeds and two legume crops on Eucalyptus hybrid
 clone establishment.
 Schumann, A.W.
 Pretoria : South African Forestry Association; 1992 Mar.
 South African forestry journal (160): p. 43-48; 1992 Mar. 
 Paper presented at the IUFRO Symposium on "Intensive Forestry:
 The Role of Eucalypts," held Sept 1991, Durban, South Africa. 
 Includes references.
 
 Language:  English
 
 Descriptors: Eucalyptus; Forest plantations; Crop weed
 competition; Weed control; Cultural methods; Mucuna pruriens;
 Vigna unguiculata; Herbicides; Cover crops
 
 
 133                                NAL Call. No.: S544.3.O5O5
 Improving native pecan groves.
 Taylor, G.C.
 Stillwater, Okla. : The Service; 1991 Jul.
 OSU extension facts - Cooperative Extension Service, Oklahoma
 State University v.): 4 p.; 1991 Jul.
 
 Language:  English
 
 Descriptors: Oklahoma; Carya illinoensis; Tree gardens; Tree
 fruits; Thinning; Selective felling; Cover crops
 
 
 134                                 NAL Call. No.: QL461.E532
 Influence of winter cover crop suppression practices on
 seasonal abundance of armyworm (Lepidoptera: Noctuidae), cover
 crop regrowth, and yield in no-till corn.
 Laub, C.A.; Luna, J.M.
 Lanham, Md. : Entomological Society of America; 1991 Apr.
 Environmental entomology v. 20 (2): p. 749-754; 1991 Apr. 
 Includes references.
 
 Language:  English
 
 Descriptors: Zea mays; Mythimna unipuncta; Secale cereale;
 Cover crops; No-tillage; Population dynamics; Insect control
 
 Abstract:  Rye (Secale cereale L.), used as a winter cover
 crop, was killed by paraquat or by mowing with a bushog. In
 the early stages of subsequent no-till corn, abundance of
 armyworm, Pseudaletia unipuncta (Haworth), was lower in the
 mowed treatment compared with the sprayed treatment in three
 of five fields and did not differ in another field. Over the
 duration of the first armyworm generation, cumulative
 armyworm-days in the sprayed treatment were greater than in
 the mowed treatment in three of five fields and did not differ
 in another field. Mowing the cover crop was 40% less expensive
 than spraying. Competition from rye regrowth in the mowed
 treatment did not diminish yields. Corn silage yields were
 increased by mowing (P = 0.07), and the average increase in
 net benefit from mowing the cover crop compared with spraying
 was $91-113/ba. Cover crop mowing may be an economical and
 effective means of managing armyworm populations in no-till
 corn.
 
 
 135                                  NAL Call. No.: SB193.P72
 Initial development of early blooming annual cool season
 legumes for use in conservation tillage.
 Owsley, C.M.; Kirkland, M.S.; Surrency, E.D.
 Madison, Wis. : The Department; 1989.
 Progress report, clovers and special purpose legumes research -
  University of Wisconsin, Department of Agronomy v. 22: p.
 31-33; 1989.  Includes references.
 
 Language:  English
 
 Descriptors: Georgia; Leguminosae; Double cropping; No-
 tillage; Flowering date; Earliness; Cover crops; Selection
 criteria; Plant breeding
 
 
 136                                NAL Call. No.: S544.3.N7A4
 Interplanting cover crops reduces herbicide usage, controls
 erosion and fixes nitrogen.
 Sumner, K.
 Middletown, N.Y. : Cornell Cooperative Ext.--Orange County
 Agriculture Program, Education Center; 1991 Oct.
 Agfocus : publication of Cornell Cooperative Extension--Orange
 County. p. 9; 1991 Oct.
 
 Language:  English
 
 Descriptors: Cover crops; Erosion control; Nitrogen fixation;
 Herbicides
 
 
 137                                 NAL Call. No.: HM206.A1H8
 Land use, soil loss, and sustainable agriculture in Rwanda.
 Clay, D.C.; Lewis, L.A.
 New York, N.Y. : Plenum Press; 1990 Jun.
 Human ecology v. 18 (2): p. 147-161; 1990 Jun.  Includes
 references.
 
 Language:  English
 
 Descriptors: Rwanda; Farm management; Land use;
 Sustainability; Erosion control; Soil conservation; Cropping
 systems; Slope; Cover crops; Viability; Land productivity;
 Environmental degradation; Farm surveys
 
 
 138                    NAL Call. No.: S599.9.T783T76 no.90-01
 Legume green manures principles for management based on recent
 research. Lathwell, D. J.
 Soil Management Collaborative Research Support Program
 Raleigh, NC : Soil Management Collaborative Research Support
 Program, N.C. State University,; 1990.
 30 p. : ill. ; 28 cm. (TropSoils bulletin ; no. 90-01). 
 Includes bibliographical references (p. 29-30).
 
 Language:  English
 
 Descriptors: Legumes; Green manure crops; Organic fertilizers
 
 
 139                                   NAL Call. No.: 56.9 SO3
 Legume mulch and nitrogen fertilizer effects on soil water and
 corn production.
 Corak, S.J.; Frye, W.W.; Smith, M.S.
 Madison, Wis. : The Society; 1991 Sep.
 Soil Science Society of America journal v. 55 (5): p.
 1395-1400; 1991 Sep. Includes references.
 
 Language:  English
 
 Descriptors: Kentucky; Vicia villosa; Zea mays; No-tillage;
 Crop production; Silt loam soils; Cover crops; Live mulches;
 Crop residues; Preplanting treatment; Nitrogen fertilizers;
 Nitrogen; Nutrient content; Soil water content; Temporal
 variation; Spatial variation; Crop yield; Growth; Nutrient
 transport; Water use efficiency; Crop growth stage; Nutrient
 availability; Water conservation; Profiles; Maize stover;
 Grain; Precipitation; Transpiration
 
 Abstract:  Hairy vetch (Vicia villosa Roth) as a winter annual
 legume cover crop, can increase grain yield of no-till corn
 (Zea mays L.). Optimizing management of this system depends on
 understanding beneficial effects. This field study examined
 effects of hairy vetch (HV) and N fertilizer on soil water
 content, crop growth, N assimilation, and water-use
 efficiency. Cover-crop treatments, each with 0 and 255 kg ha-1
 of fertilizer N, were (i) winter fallow, (ii) aboveground HV
 removed at corn planting, (iii) HV left in place, and (iv) HV
 left in place and supplemented with that removed from (ii).
 Transpiration by HV before corn planting reduced soil water
 content, decreasing early growth of corn during years of low
 spring rainfall. By 2 to 4 wk after planting, however, soil
 water content under HV mulch was similar to winter fallow.
 Soil water content was higher with HV mulch only during the
 second 4-wk period following planting and only in the upper
 7.5 cm of the profile. Greater soil water use associated with
 N fertilizer occurred after about 8 wk in 2 of the 3 yr. Hairy
 vetch treatments sit the zero-N fertilizer level increased
 corn growth, N assimilation, grain yield, and water-use
 efficiency. The high-N treatment negated these benefits of HV.
 Because of this and the lack of mulch effects on soil water
 during inter stages of crop growth, we concluded that N
 supplied to no-till corn was the principal, immediate benefit
 of HV during this study.
 
 
 140                                     NAL Call. No.: SB1.H6
 Legumes alone and in combination with manure as fertilizers in
 an intensive muskmelon production system.
 Singogo, W.; Lamont, W.J. Jr; Marr, C.W.
 Alexandria, Va. : American Society for Horticultural Science;
 1991 Nov. HortScience v. 26 (11): p. 1431; 1991 Nov.  Includes
 references.
 
 Language:  English
 
 Descriptors: Cucumis melo; Green manures; Medicago sativa;
 Vicia villosa; Pisum sativum; Cattle manure; Trickle
 irrigation; Plastic film; Intensive production; Crop yield;
 Fruits
 
 
 141                                    NAL Call. No.: 4 AM34P
 Legumes and grasses in crop rotation.
 Lyon, T.L.
 Madison, Wis. : American Society of Agronomy; 1927 Jun.
 Journal of the American Society of Agronomy v. 19 (6): p.
 534-544; 1927 Jun. Paper presented at the symposium on
 "Potash", November 19, 1926, Washington, D.C.  Includes
 references.
 
 Language:  English
 
 Descriptors: Legumes; Grasses; Alfalfa hay; Clover hay;
 Rotations; Green manures; Cereals
 
 Abstract:  A partial review of recent experiment station
 literature concerning experiments to ascertain the effect of
 legumes, grasses, and green manures on the yields of
 succeeding crops shows the following. With a few exceptions
 experiments in the humid portions of the country have
 demonstrated the superiority of red clover and alfalfa over
 timothy in their effect on the yields of crops that follow.
 That the beneficial effect of clover is due to its property as
 a legume has been shown by a number of field experiments in
 which comparison was made of the yields of similar crops grown
 in the same years in two or more rotations in which clover is
 replaced by some non-legume crop grown in the same year as the
 clover. The same principle has been demonstrated by
 determining the nitrate nitrogen contained in drainage water
 from soil in which clover residues have been incorporated and
 also in which timothy residues have been incorporated. Tests
 conducted, at eight experiment stations in humid regions
 indicate on the soils used for the tests a greater
 effectiveness of legumes as compared with non-legume green
 manures on the yields of succeeding crops. The data indicate
 that a practical advantage is to be gained by the succeeding
 crop from replacing oats and possibly corn by soybeans,
 especially when clover is not included in the rotation. Some
 tests have resulted in a larger crop following a mixture of
 corn and soybeans and oats and field peas than after either
 cereal alone. The total number of trials has been few and
 results have not been uniform, consequently a definite
 conclusion cannot be drawn. The region of dry farming is the
 only part of this country in which legumes do not affect
 favorably the yield of the succeeding crop with a reasonable
 degree of certainty. That lack of soil moisture is the
 explanation would appear from the fact that irrigated soil in
 the same region gives a good response to legumes.
 
 
 142                        NAL Call. No.: 100 C125 (2) no.255
 Leguminous plants as organic fertilizers in California
 agriculture. Kennedy, P. Beveridge
 Berkeley, Calif. : University of California, College of
 Agriculture, Agricultural Experiment Station,; 1922.
 8 p. : ill. ; 24 cm. (Circular (California Agricultural
 Experiment Station) ; no. 255.).
 
 Language:  English; English
 
 Descriptors: Legumes; Green manuring
 
 
 143                             NAL Call. No.: 100 V81S no.60
 The liberation of plant nutrients from the soil as affected by
 alfalfa. Hill, H. H.
 Blacksburg, Va. : Virginia Agricultural Experiment Station,;
 1937. 19 p. : ill. ; 24 cm. (Technical bulletin (Virginia
 Agricultural Experiment Station) ; 60.).  Cover title. 
 Bibliography: p. 18-19.
 
 Language:  English
 
 Descriptors: Alfalfa; Green manuring
 
 
 144                                    NAL Call. No.: 80 AC82
 Living mulch ground covers for weed control between raspberry
 rows. Freyman, S.
 Wageningen : International Society for Horticultural Science;
 1989 Nov. Acta horticulturae (262): p. 349-356; 1989 Nov. 
 Paper presented at the "5th International Symposium on Rubus &
 Ribes," / edited by H.A. Daubeny, June 24-July 2, 1989,
 Vancouver, B.C., Canada.  Includes references.
 
 Language:  English
 
 Descriptors: British Columbia; Rubus idaeus; Row spacing; Weed
 control; Live mulches; Lolium perenne; Festuca ovina;
 Trifolium repens; Hordeum vulgare; Yield response functions
 
 
 145