The Sustainable Agriculture Research and Education Program at the University of California-Davis provides research and education about agriculture and food systems. It posts a page explaining what sustainable agriculture is and what issues are involved.

Mark Bomford is director of the Yale Sustainable Food Project at Yale University in New Haven, Conn. It supervises a sustainable dining program at Yale, manages an organic farm and sponsors programs on food and agriculture.

Ferd Hoefner is policy director of the National Sustainable Agriculture Coalition, an alliance of several organizations.

Rob Hedberg is director of the Sustainable Agriculture Research & Education program, which is part of the U.S. Department of Agriculture’s Cooperative State Research, Education and Extension Service. It promotes farming systems that are “profitable, environmentally sound and good for communities through a nationwide research and education grants program.”

Bob Stallman is president of the American Farm Bureau Federation. The national organization links to state farm bureaus. See its backgrounder (PDF) on the bill and an explanation of its priorities and concerns about the Senate measure.

Jon Scholl is president of American Farmland Trust, a conservation organization. It has a website devoted to the farm bill.

Roger Johnson is president of the National Farmers Union, which has posted its recommendations for the Farm Bill. NFU provides contact information for state and regional organizations as well.

Farm Policy Facts is a nonprofit coalition of farming and commodity groups working to educate Congress and the public on sound farm policy. Its website includes a page of data about U.S. farming.

Stephen L. Censky is chief executive officer of the American Soybean Association, which has posted its outlook for the farm bill. The association lists executive committee members from around the country.