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Physical Soil Properties--Elbert County,Colorado,Western Part <br /> Erosion factor T is an estimate of the maximum average annual rate of soil <br /> erosion by wind and/or water that can occur without affecting crop productivity <br /> over a sustained period. The rate is in tons per acre per year. <br /> Wind erodibility groups are made up of soils that have similar properties affecting <br /> their susceptibility to wind erosion in cultivated areas. The soils assigned to <br /> group 1 are the most susceptible to wind erosion, and those assigned to group 8 <br /> are the least susceptible. The groups are described in the"National Soil Survey <br /> Handbook." <br /> Wind erodibility index is a numerical value indicating the susceptibility of soil to <br /> wind erosion, or the tons per acre per year that can be expected to be lost to <br /> wind erosion.There is a close correlation between wind erosion and the texture <br /> of the surface layer, the size and durability of surface clods, rock fragments, <br /> organic matter, and a calcareous reaction. Soil moisture and frozen soil layers <br /> also influence wind erosion. <br /> Reference: <br /> United States Department of Agriculture, Natural Resources Conservation <br /> Service. National soil survey handbook,title 43041. (http://soils.usda gov) <br /> USDA Natural Resources Web Soil Survey 3/12/2018 <br /> Conservation Service National Cooperative Soil Survey Page 3 of 6 <br />