The last five years saw another 13 million acres of U.S. land converted to corn growing, at the expense of, reports Foley, ???wheat (which lost 2.9 million acres), oats (1.7 million acres lost), sorghum (1 million acres lost), barley, alfalfa, sunflower and other crops.??? Not to mention another 1.3 million acres of grassland over the same period.