DuPont struck a partnership deal with the Department of Agriculture to create guidelines for how the company's cellulosic ethanol plant in Nevada, Iowa, will obtain corn stover without harming soil quality. The biorefinery, which is due to enter service in 2014, is expected to produce 30 million gallons of ethanol from 375,000 tons of corn stover annually. "Cellulosic advanced biofuel is here and it's here to stay," said Agriculture Secretary Tom Vilsack.

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