Archer Daniels Midland Co. (ADM), the country's largest ethanol producer, is enthusiastic about using farmland to produce fuel. Cargill has been more restrained. Recent comments by the chairmen of both companies mirror a larger debate on how big of a contribution ethanol can make toward reducing the U.S. need for oil imports, and whether using more corn to make more fuel will lead to higher food prices, according to a report from the Associated Press.

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Archer Daniels Midland Co. (ADM), the country's largest ethanol producer, is enthusiastic about using farmland to produce fuel. Cargill has been more restrained. Recent comments by the chairmen of both companies mirror a larger debate on how big of a contribution ethanol can make toward reducing the U.S. need for oil imports, and whether using more corn to make more fuel will lead to higher food prices, according to a report from the Associated Press.