Browsing the "overplowing" Tag

Full Planet, Empty Plates, Chapter 5: Eroding Soils Darkening Our Future

June 26th, 2013 | by Earth Policy Institute

The thin layer of topsoil that covers the earth’s land surface was formed over long stretches of geological time as new soil formation exceeded the natural rate of erosion. Sometime within the last century, soil erosion began to exceed new soil formation. Now, nearly a third of the world’s cropland is losing topsoil faster than new soil is forming, reducing the land’s inherent fertility. Soil that was formed on a geological time scale is being lost on a human time scale



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