The Agricultural Research Service is reporting that sweet potatoes have produced twice as much ethanol as corn, in closely monitored trials conducted in Maryland and Alabama. The ARS said that yields from sweet potato have approached those for sugar cane, the leading first-generation biofuel feedstock. Follow-up research will measure fertilizer, water and other inputs.
The ARS also tested cassava, which trailed corn in the Maryland trial but doubled the yield from Alabama corn.
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