Falling demand for gasoline coupled with a dry spell in key corn-growing areas could make 2013 another challenging year for ethanol producers, insiders said. Twenty of the nation's 211 ethanol plants have suspended operations because of the drought-induced spike in corn prices, but there are signs of recovery as the Department of Agriculture's latest outlook projects this year's corn crop at 14.5 billion bushels, which would be a record high.

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