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.”

The Roper Center for Public Opinion Research at the University of Connecticut is one of the world’s leading archives of social science data, specializing in data from surveys of public opinion.

American National Election Studies produces high quality data from its own surveys on voting, public opinion, and political participation.

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.

The Quinnipiac University Polling Institute is operated out of Quinnipiac University in Hamden, Conn., and regularly conducts surveys of residents of Connecticut, Florida, New Jersey, New York, Ohio, Pennsylvania, and Virginia as well as nationwide.

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.