A few moments ago I heard a commercial about ethanol production. The farmer said "Its wonderful that we can plow our fields in the spring, tend our crops during the summer, harvest during the fall and convert the crops to fuel our tractors the next year"
This is a wonderful way to have your farm up on the auction block the following year.
As to produce enough corn to convert to fuel to plow the fields would require 1.5 acres per 5 gallons of ethanol. The only farm land that could produce enough fuel to run the farm and produce a profit would be huge corporate farms where million dollar harvesters could farm maga farms to keep the cost of production down.
This would cause the price of corn for food supply to skyrocket as large tracts of land are converted to fuel production so that at some point it would cause the farmer to stop growing for fuel as the profits would be greater to produce for food stocks.
This from the same folks that are opposed to huge corporate farms and say they want to save the small farmer.
Such is the way with unintended consequences