| OCR Text |
Show Erosion tbootons Each year, more than 6.4 blUion tons of soil erode from the nation's farmland and other nonfederal lands. In many areas the rate of erosion seriously threatens long term agricultural productivity. pro-ductivity. There are un- , acceptable erosion rates on more than 140 million acres of cropland. ' Norman Berg, chief of the USDA's Soil C nserva-tion nserva-tion Service said that erosion rate exceed acceptable lev -els on more than 295 million acres of cropland, pasture -land, forest landK and range -land. Scientists consider erosion tolerable if it can be replaced by natural processes. pro-cesses. Of the more than 6.4 billion tons of soil losses from wind and water erosion ' each year, more than 5 billion tons erode from agricultural agri-cultural land, streambanks, v etc contribute 1.1 billion tons more. Sediment the greatest single water pollutant by volume. vol-ume. Is an end product of soil erosion. |
