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I <br /> U.S. DEPARTMENT OF AGRICULTURE PAGE 4 OF 4 <br /> �URAL RESOURCES CONSERVATION SERVICE 01/28/97 <br /> ' PHYSICAL PROPERTIES OF SOILS <br /> note -- PHYSICAL PROPERTIES OF SOILS--Continued <br /> 5. Noncalcareous loans and silt foams that are less than 20 <br /> ' percent clay and sandy clay foams, 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 foams and silt loams that are more than 20 <br /> percent clay and noncalcareous clay foams 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 (WEO). The index number indicates the <br /> Punt of Soil lost in tons per acre per year. The range of wind erodibility index numbers is 0 to 300. <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 i <br /> 1 <br />