Nahun Villagomez Sanchez washes freshly dug Red LaSoda potatoes at T&D Willey Farms near Madera, Calif. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Arctic Granny (right), a GMO variety created by Okanagan Specialty Fruits, got the gren light from federal regulators Friday. The apple doesn't turn brown like a conventional Granny Smith apple (left). Okanagan Specialty Fruits hide caption

itoggle caption Okanagan Specialty Fruits

Albion strawberries, a variety created at UC Davis, grow on the Chino family farm in Rancho Santa Fe, Calif., on March 7, 2013. Mike Blake/Reuters/Corbis hide caption

itoggle caption Mike Blake/Reuters/Corbis

A cereal rye cover crop grows (at left) in a field where corn was recently harvested. Cover crops can capture nutrients such as nitrate and prevent them from polluting nearby streams. Courtesy of Paul Jasa/University of Nebraska-Lincoln hide caption

itoggle caption Courtesy of Paul Jasa/University of Nebraska-Lincoln

The defending champion and favorite remains the chicken wing. But underdog snacks like the carrot are trying to elbow their way into the competition. Leif Parsons for NPR; Source: whologwhy/Flickr hide caption

itoggle caption Leif Parsons for NPR; Source: whologwhy/Flickr

Cattle in holding pens at the Simplot feedlot located next to a slaughterhouse in Burbank, Washington on Dec. 26, 2013. Merck & Co Inc is testing lower dosages of its controversial cattle growth drug Zilmax drug in an effort to resume its sales to the $44 billion U.S. beef industry. Ross Courtney/Reuters/Landov hide caption

itoggle caption Ross Courtney/Reuters/Landov

Workers prepare burritos at a Chipotle Mexican Grill in New York. The restaurant chain has stopped serving pork in about one-third of its U.S. locations. Richard Levine/Demotix/Corbis hide caption

itoggle caption Richard Levine/Demotix/Corbis

After a turn in the tumbling machine, these conventional russet Burbank potatoes are starting to show signs of bruising. New GMO potatoes called Innate russet Burbanks have been bred not to bruise as easily as these. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

The city of Des Moines, Iowa, sits on the Raccoon and Des Moines rivers. The city's water works says it will sue three neighboring counties for high nitrate levels in these waterways. iStockphoto hide caption

itoggle caption iStockphoto

These "enriched cages" from the JS West farm in Atwater, Calif., in 2011 comply with the state's new law. They are larger and allow chickens to perch and lay eggs in enclosed spaces. Jill Benson/AP hide caption

itoggle caption Jill Benson/AP

Cows rotate in the milking parlor at Fair Oaks Farms, a large-scale dairy and tourist attraction, near Rensselaer, Ind. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

The Cornucopia Institute commissioned this photo of an organic egg producer in Saranac, Mich. According to Cornucopia, the facility is owned by Herbruck's Poultry Ranch, which has a license to maintain up to 1 million chickens on this site. Courtesy of The Cornucopia Institute hide caption

itoggle caption Courtesy of The Cornucopia Institute