Drip irrigation being used in a field.

USDA. NAL. Water and Agriculture Information Center.

Publications on irrigation in general and as related to nitrogen, phosphorus, pathogens, pesticides, erosion and sedimentation, and fish and wildlife; irrigation water quality; polyacrylamide (PAM) and soils, etc. from the AGRICOLA database.

USDA Economic Research Service

Facts and figures about irrigation in the United States.

USDA. NRCS. West National Technology Support Center.

Serves as a clearinghouse for information on irrigation and natural resources conservation. Find models, handbooks, manuals, training and other materials.

USDA. Agricultural Research Service.

"The mission of the Water Management Research Unit is to develop irrigation and drainage water management practices and methods that use water efficiently, improve agricultural productivity and sustainability, and reduce negative environmental impacts of irrigated agriculture in semi-arid and arid areas; and to develop chemical and non-chemical alternatives to soil fumigation with methyl bromide."

Food and Agriculture Organization of the United Nations and others.

"The Food and Agriculture Organization of the United Nations (FAO) together with the World Health Organization (WHO), the United Nations Environment Programme (UNEP), the United Nations University Institute for Water, Environment and Health (UNU-INWEH) and the UN-Water Decade Programme on Capacity Development (UNW-DPC), in collaboration with the International Commission on Irrigation and Drainage (ICID) and the International Water Management Institute (IWMI), have initiated a Capacity Development Project on the Safe Use of Wastewater in Agriculture." This site provides publications and videos on the topic.

DOI. Bureau of Reclamation.

"Due to a significant reduction in program funding in FY2005, the majority of program activities were suspended. The website provides current data for other associated programs, research activities, and the status of each project in FY2005. This serves as an invaluable foundation for ongoing research activities and future remediation in these project areas."