"Specifically, corn has seen the following changes between 1987 and 2007, Dickey [President of National Corn Growers] noted.
1. Land use: The amount of land needed to produce one bushel has decreased 37 percent.
2. Soil loss: Manageable soil loss per bushel of corn has decreased by 69 percent.
3. Energy: The energy used to produce a bushel of corn has decreased by 37 percent.
4. Climate impact: Corn production has seen a 30 percent decrease in greenhouse gas emissions per bushel."
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