Chris Costa and one of her chickens on her farm in Downingtown, Pa. Costa and her partner, T.J., found the land for this farm through a sustainable agriculture program. Emma Lee/WHYY hide caption

itoggle caption Emma Lee/WHYY

Orchards like this one in Adams County, PA, and other U.S. farms face worldwide competition for their apples and apple products due to imports. Brad C. Bower/AP hide caption

itoggle caption Brad C. Bower/AP

Sens. Jeanne Shaheen, D-N.H., and Pat Toomey, R-Pa., talk to reporters about the farm bill at the U.S. Capitol in June. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

A shopper surveys the produce at Pacifica Farmers Market in Pacifica, Calif., in 2011. AP hide caption

itoggle caption AP

Grandpa Traub — corn former and millionaire. Chana Joffe-Walt/NPR hide caption

itoggle caption Chana Joffe-Walt/NPR

Sweet potato evangelist Maria Isabel Andrade from the International Potato Center drives around Mozambique in her orange Toyota Land Cruiser. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Potatoes come in all colors, like these Red Erik, Snowball, Cariboo, Purple Peruvian, Caribe and French Red varieties. David Cavagnaro/Corbis hide caption

itoggle caption David Cavagnaro/Corbis

These piglets on the Hardin farm in Danville, Ind., are going to cost more to feed than they will fetch at market. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR