Average corn can be processed to yield 2½ gallons of ethanol per bushel. It has

Question

Average corn can be processed to yield 2½ gallons of ethanol per bushel. It has about 2/3 the energy of gasoline. A barrel of average oil can be processed to yield about 19 gallons of gasoline. If the consumption of energy from petroleum in the U.S. from Table 2.1 was switched to ethanol from corn: ( U.S consumption of energy from petroleum is 22.2 Bbl per year/capita)

        a) How many bushels or corn would be needed each year?

        b) With an average yield of 159 bushels per acre how many acres?

        c) With 914 million acres of farmland in the U.S. what percentage

              would be needed to produce corn for vehicle ethanol?

Explanation / Answer

1) 21/2 gallons per bushels , US consumption is 22.2 billion barrel per year so will

a barrel has 19 gallons so 421.8 billion gallons, so 169 billion gallons/ bushels is required.

2)159 bushels per acre so 0.94 billion acres ground is required

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