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Originally Posted by phidauex
I'm not sure exactly what number you are going after, but let me give it a try.
1 billion bushels to China.
A bushel of soybeans is about 60 pounds
Soybeans are about 18% oil by weight
Soybean biodiesel weighs about 7.35 pounds per gallon
Hence, a bushel of soybeans yields about 1.46 gallons of biodiesel, and a billion bushels yields about 1.469 billion gallons of biodiesel.
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This is assuming one gallon of oil yields one gallon of biodiesel, which it does not. The actual yield of biodiesel is going to be less than the 1.46 gallons.