Illinois farmers may be having second thoughts about how much corn they plant this year. Falling corn prices and questions about the demand for ethanol may have them taking a closer look at soybeans. After several years of increasing corn production that culminated in last year's record crop, there's now a corn surplus that's cut prices from eight-dollars-a-bushel in 2012 to about four-dollars now. Farmers will factor in an EPA proposal to reduce the amount of ethanol to be blended into gasoline.