WASHINGTON, D.C. -- The USDA reports farmers plan to plant 97.3 million acres of corn this year. That's the largest number seen since 1936. Thursday's spring planting survey released says the 2013 corn planting forecast is up slightly from last year. Corn remains profitable, as prices are strong after last year's drought left the grain in short supply. Record corn acreage is expected in Arizona, Idaho, Minnesota, Nevada, North Dakota, and Oregon. But some Corn Belt states will continue to be affected by the worst drought since the 1950s, because a lower number of corn is expected to be planted.