8 billion gallons of fuel from corn crop waste: USDA, Iowa State report confirms potential

Biofuels Digest: Corn stover. It’s that inedible leftover from the corn crop, and if you’ve ever noted how big a corn plant is in comparison to the size of the ear, you know there’s a lot of it.

Traditionally, it’s left on the field, and returns nutrients to the soil as it is broken down by bacteria.

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