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Based on modern plant distribution and abundance, it is plausible that Panicum sp. and Andropogon sp. grains are largely derived from the species switchgrass and big bluestem, respectively.
More energy was also required to produce fuels from switchgrass , wood chips, and sunflower plants than their respective fuels generate.
I'm opposed to corn-ethanol subsidies for these reasons, but I'm open to switchgrass and other alternatives.
Using switchgrass for ethanol production results in even higher energy gains: up to 72 percent.
Warm-season grass pastures were a mix of big and little bluestem, Indian grass, switchgrass , and sideoats grama; grazing began June 8.
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