Mas Masumoto grew up on his family farm southeast of Fresno, Calif. His 1987 essay "Epitaph for A Peach," in which he bemoaned the loss of heirloom flavors, captured his changing philosophy as a farmer. It also helped turn his farm into a landmark in the local-food movement. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

A field of unharvested wheat is seen in Ashby-de-la-Zouch, England, in 2012. Wheat wasn't cultivated in Britain until some 6,000 years ago, but DNA evidence suggests early Britons were eating the grain at least 8,000 years ago. Darren Staples/Reuters/Landov hide caption

itoggle caption Darren Staples/Reuters/Landov

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 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

Sister Elizabeth feeds Yoda, a water buffalo calf at the ranch. The nuns bought the buffalo to make mozzarella. Sonja Salzburg for Harvest Public Media hide caption

itoggle caption Sonja Salzburg for Harvest Public Media

Owner Mary Kraft at Badger Creek Dairy outside Fort Morgan, Colo. Luke Runyon/KUNC/Harvest Public Media hide caption

itoggle caption Luke Runyon/KUNC/Harvest Public Media

Pinatas are among the new generation of club apples — varieties that are not just patented, but also trademarked and controlled in such a way that only a select "club" of farmers can sell them. Stemilt Growers LLC hide caption

itoggle caption Stemilt Growers LLC