A man harvests fruits of the Jatropha tree in Taabo, Ivory Coast. Jatropha, which is grown in many parts of the world, has fallen from favor as a diesel fuel substitute. Kambou Sia/AFP/Getty Images hide caption

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President Obama and Agriculture Secretary Tom Vilsack (second from right) inspect drought-damaged corn on the McIntosh farm in Missouri Valley, Iowa. Carolyn Kaster/AP hide caption

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A dairy cow peeks out of its stall at Case van Steyn's dairy in Galt, Calif. Kathleen Masterson/NPR hide caption

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Jameson Small uses a late-1800s seeder to plant lettuce at Tuttle farm in Dover, N.H. Small is part of a group of young farmers who are taking care of the land as the owners await a buyer. Jim Cole/AP hide caption

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