FILE PHOTO: "BEST PHOTOS OF 2012" (***BESTOF2012***): Combines harvest soybeans at the Morro Azul farm near Tangara da Serra, Brazil, on Tuesday, March 27, 2012. Soybean prices in Chicago may rise to $14.50 a bushel as drought hampers crops in South America, boosting the outlook for U.S. exports, said William Tierney, the chief economist at AgResource Co. in Chicago. Photographer: Paulo Fridman/Bloomberg via Getty Images
