Empty shelves where eggs should be at a Whole Foods Market in Washington, D.C. The store blames increased demand for organic eggs. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Benny Bunting, a farm advocate for Rural Advancement Foundation International-USA, in front of one of his old chicken houses in Oak City, N.C. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Allen Williams grows corn and soybeans for Clarkson Grain, which has been selling GMO-free grain to Japan for years. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

After Grist's six-month-long series on genetically modified foods, some loyal readers accused the site of changing directions in the debate. iStockphoto hide caption

itoggle caption iStockphoto

Soon after being sliced, a conventional Granny Smith apple (left) starts to brown, while a newly developed GM Granny Smith stays fresher looking. Courtesy of Okanagan Specialty Fruits Inc. hide caption

itoggle caption Courtesy of Okanagan Specialty Fruits Inc.

A dead carp floats in water near the shore at Big Creek State Park on Sept. 10 in Polk City, Iowa. Like many agricultural states, Iowa is working with the EPA to enforce clean-water regulations amid degradation from manure spills and farm-field runoff. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP

Chris and Sara Guerre are among a growing number of farmers who have made the choice to rent land to farm instead of buy because of increasing property values. Zac Visco for NPR hide caption

itoggle caption Zac Visco for NPR

Ritter Sport says the chemical responsible for the vanilla-like aroma in its top-selling Voll-Nuss chocolate nut bar is all natural. But Stiftung Warentest — basically Germany's version of Consumer Reports — disagrees. Ariel Awesome/Flickr hide caption

itoggle caption Ariel Awesome/Flickr

Retired farmer Joe Govert looks at a parcel of family land near Tribune, Kan. It has been enrolled in the Conservation Reserve Program. Charlie Riedel/AP hide caption

itoggle caption Charlie Riedel/AP

Seed corn sits in the hopper of a planter. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images