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U.S. DEPARTMENT OF AGRICULTURE PAGE 5 OF 5 <br /> NATURAL RESOURCES CONSERVATION SERVICE 01/18/00 <br /> • <br /> PHYSICAL PROPERTIES OF SOILS <br /> Endnote -- PHYSICAL PROPERTIES OF SOILS--Continued <br /> S. Noncalcareous loams and silt lcams that are less than 20 <br /> percent clay and sandy clay loams, sandy clays, and hemic <br /> soil material. These soils are slightly erodible. Crops <br /> can be grown if measures to control wind erosion are used. <br /> 6. Noncalcareous loams and silt loams that are more than 20 <br /> percent clay and noncalcareous clay loams that are less than <br /> 35 percent clay. These soils are very slightly erodible. <br /> Crops can be grown if ordinary measures to control wind <br /> erosion are used. <br /> 7. Silts, noncalcareous silty clay loams that are less than <br /> 35 percent clay, and fibric soil material. These soils are <br /> very slightly erodible. Crops can be grown if ordinary <br /> measures to control wind erosion are used. <br /> 8. Soils that are not subject to wind erosion because of <br /> coarse fragments on the surface or because of surface <br /> wetness. <br /> The WIND ERODIBILITY INDEX is used in the wind erosion equation (WE0) . The index number indicates the <br /> amount of soil lost in tons per acre per year. The range of wind erodibility index numbers is 0 to 300. <br /> i <br />