| http://www.w3.org/ns/prov#value | - One way to perhaps do this is through producing two crops, one a biofuel crop and the other a food crop all in the same growing season, which is referred to as ???double-cropping.??? In the upper Midwest, this means using a winter cover crop (as the first crop), which farmers and scientists already know is a good idea, followed by a short-season summer crop like soybean.
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