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

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