Perdue, the poultry giant, acquired the Niman Ranch name and reputation of raising animals without antibiotics in September. John Greim/Universal Images Group/Getty Images hide caption

itoggle caption John Greim/Universal Images Group/Getty Images

A worker pours a bucket of pesticide into a machine to be sprayed on almond trees at Del Bosque Farms Inc. in Firebaugh, Calif., on April 6, 2015. California and Washington already have adopted, through state regulation, many of the rules that the EPA now wants to put in place nationwide. David Paul Morris/Bloomberg/Getty Images hide caption

itoggle caption David Paul Morris/Bloomberg/Getty Images

The Svalbard Global Seed Vault was inaugurated in 2008. The "doomsday vault" lies inside an Arctic mountain in the remote Norwegian archipelago of Svalbard. For the first time, scientists are taking some seeds out. John McConnico/AP hide caption

itoggle caption John McConnico/AP

In this 2011 photo, a banner in an Iowa grocery store advertises "pork, the other white meat" — the former, long-running slogan of the National Pork Board. Funded by money collected by the federal government, the board is one of a dozen promotional funds for different parts of American agriculture. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP

Peanut Corporation of America's then-president Stewart Parnell arrives at federal court in 2009. Parnell was sentenced Monday to 28 years in prison for his role in a deadly salmonella outbreak from tainted peanut butter products. Don Petersen/AP hide caption

itoggle caption Don Petersen/AP

Cage-free chickens in a barn near Hershey, Pa., get to roam and perch on steel rods, but they don't go outside. This week, McDonald's became the latest big buyer to demand cage-free eggs. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Just Mayo looks like mayonnaise and tastes like mayonnaise but contains no eggs. That's ruffled the feathers of the egg industry. Courtesy of Hampton Creek hide caption

itoggle caption Courtesy of Hampton Creek

Almonds hang from a branch at an orchard in Firebaugh, Calif. Despite the strain of prolonged drought, in 2014, California farms sold $54 billion worth of crops like almonds or grapes, and animal products like milk. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Ah, sugar — we love the sweetness, but not the calories. For more than a century, food technologists have been on a quest for the perfect, guilt-free substitute. The latest candidate, allulose, is not available to consumers in a crystal form: It is a syrup only available to manufacturers. Ryan Kellman/NPR hide caption

itoggle caption Ryan Kellman/NPR

In the years before the drought began, Australia carried out a giant reset of its water rights. First, the government put a cap on the total amount of water available for farmers. Then, farmers received shares of that total supply. Martin Benik/Corbis hide caption

itoggle caption Martin Benik/Corbis

Young pigs stare out of a pen at a hog farm in North Dakota. In coming months, consumers will start to see a new label on some packages of pork: Produced "without the use of ractopamine." Will Kincaid/AP hide caption

itoggle caption Will Kincaid/AP

A clampdown on contamination in growing fields has pushed out wildlife and destroyed habitats. Adam Cole/NPR hide caption

itoggle caption Adam Cole/NPR

Final inspection of frozen blueberries at the Atlantic Blueberry Co. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR