Corn plants struggle to survive in a drought-stricken farm field on July 19, 2012 near Oakton, Indiana. The corn and soybean belt in the middle of the nation is experiencing one of the worst droughts in more than five decades. Indiana was the nation's fourth largest corn producer in 2011. (Photo by Scott Olson/Getty Images)
Corn plants struggle to survive in a drought-stricken farm field on July 19, 2012 near Oakton, Indiana. The corn and soybean belt in the middle of the nation is experiencing one of the worst droughts in more than five decades. Indiana was the nation's fourth largest corn producer in 2011. (Photo by Scott Olson/Getty Images)