Answer: Source: USDA NASS, 2012 Census of Agriculture. changed little, declining from 922 million acres in 2007 to 915 million acres in 2012 (or 40.8 percent of U.S. land to 40.5 percent). The average size of U.S. farms in 2012 was 434 acres, 4 percent larger than five years earlier.
Food production takes up almost half of the planet's land surface and threatens to consume the fertile land that still remains, scientists warn. The global impact of farming on the environment is revealed in new maps, which show that 40 percent of the Earth's land is now given over to agriculture.
over half of all the land in the nation
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