USDA. Natural Resources Conservation Service.
Research summaries, articles, Webinars, and information on soil heath and soil management topics from U.S. land-grant universities.
USDA. Economic Research Service.
Describes research on and economic aspects of livestock and poultry manure application to farmland. Provides links to reports and related resources.
USDA. Sustainable Agriculture Research and Education.
National Center for Appropriate Technology. ATTRA - National Sustainable Agriculture Information Service.
Publications and other resources on how to assess, improve and maintain soil health for both croplands and pastures. Specific topics include soil quality, soil biology, soil organic matter, organic fertilizers and amendments, composting, soil conservation, crop rotation, mulching and nutrient management.
Food and Agriculture Organization of the United Nations. Land and Water Development Division.
"This website provides general concept on the meaning and significance of soil biodiversity, and agriculture emphasizing the need for an integrated soil biological management."
USDA. NAL. Alternative Farming Systems Information Center.
An overview of the conservation tillage subject including a description, related bibliographies, automated database and Web site searches, search tips, recommended databases and journals, Extension and educational materials and related organizations.