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Put 5 to 6 million hectares into context (1,580ha=1mi2). How does this annual soil loss compare to the area of your state? (You can find state areas at www.enchantedlearning.com/usa/states/area.shtml.)
Soil erosion often results from water runoff caused by poor farming practices, and if erosion rates are not controlled, soil erosion can degrade water supplies.