Kelly D. Brownell is a psychology professor at Yale University, where he directs the Rudd Center for Food Policy & Obesity.

The National Farmers Union works to shape agricultural policy and educate rural leaders, farmers, and ranchers. Its website includes a link to state groups.

The American Soybean Association works to develop and implement agricultural policy. Its website lists state association presidents and state associate affiliate offices.

The American Farm Bureau Federation is the “national voice of agriculture.” It advocates for agricultural communities, farmers, and ranchers. Its website provides links to state farm bureaus.

Michael Pollan is Knight Professor of Journalism at University of California, Berkeley, where he directs the Knight Program in Science and Environmental Journalism. His books include The Omnivore’s Dilemma: A Natural History of Four Meals. Read an Oct. 9, 2008, column on farm policy that he wrote for The New York Times.

Jennifer Maiser edits the group blog EatLocalChallenge.com.

Dan Imhoff is an author, publisher and farmer in California whose writings on farm and environmental issues include the book Food Fight: A Citizen’s Guide to the Farm Bill, updated to reflect issues in this year’s bill. He is co-founder, director, and publisher of Watershed Media. Read an essay he wrote about the 2012 bill for the Oct. 3, […]

Jerry Hagstrom is founder and executive editor of the Hagstrom Report, a Washington, D.C.-based news service focusing on agricultural news.

Mark E. Graham is an associate professor of moral theology at Villanova University, Villanova, Pa., and the author of Sustainable Agriculture: A Christian Ethic of Gratitude. He has taught courses on Christian environmental ethics.