Tropical maize may be better than US corn for biofuels according to Physorg.com. There are researchers in the mid west growing tropical maize, it grows to about 14 feet (about 4m) and because it does not produce ears concentrates sugar in its stem. I guess that it grows in a manner similar to traditional maize. It might also be a useful link between straight cellulosic ethanol and fermented ethanol...
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