USDA Agricultural Marketing Service (http://www.ams.usda.gov/).
As one of its functions, this service "includes six commodity programs--Cotton, Dairy, Fruit and Vegetable, Livestock and Seed, Poultry, and Tobacco. The programs employ specialists who provide standardization, grading and market news services for those commodities."
"TEKTRAN summaries on the Internet are "snapshots in time" -- published or soon-to-be-published articles -- of recent research results from the Agricultural Research Service (ARS)...TEKTRAN summaries forecast the future of food, nutrition, and food safety; crops and livestock; natural resources and sustainable systems; industrial products; and new and emerging technology. The summaries also contain breaking news in biology, chemistry, and other sciences that support the research on the Nation's food and fiber system."
State and National Partners (http://www.csrees.usda.gov/qlinks/partners/state_partners.html)
A "directory of land-grant universities which are state partners of the Cooperative State Research, Education, and Extension Service."
AgZines: a Harvest of Free Agricultural Journals (http://usain.org/agzines.html)
Produced by the United States Agricultural Information Network (USAIN), a "compilation of agricultural journals that are available free on the web. Formerly known as Tomato Juice, this list collects web sites" that are related to the field of agriculture and related sciences
A searchable Web site that provides access to full text documents on a wide range of Extension or Outreach-oriented subjects. The work is by Extension Service and Agricultural Experiment Station professionals at several U.S. land-grant universities.