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t <br />24b--Coberly Variant sandy clay loam, 10 to 29 percent slopes. This <br />deep well drained soil is in upland swales and valley sideslopes. It <br />formed from alluvium and colluvium derived from sandstone and shale <br />with a component of aeolian material. Slopes are concave. Areas <br />are irregular in shape and are 3 to 25 acres in size. The vegetation <br />is mainly shrubs and forbs. Elevation ranges from 0420 to 7100 feet. <br />The average annual precipitation is about 14 inches and the mean annual <br />air temperature is about 42°F. <br />Typically the surface is a brown sandy clay loam about 6 inches <br />thick. The substratum is a dark brown and pale brown sandy clay loam <br />extending to a depth of greater than 60 inches. The soil is calcareous <br />. below 37 inches. <br />Included in mapping are about 10 percent coarse-loamy, mixed Aridic <br />Haploborolls of the 41 map unit. Also included are 5 percent Grail <br />Taxadjunct soils and 5 percent soils similar to the Coberly Variant <br />except that they have finer textures. <br />Permeability of the Coberly Variant soil is moderate as is <br />available water capacity. Effective rooting depth is greater than <br />60 inches. Runoff is medium and the hazard of erosion by both water <br />and wind is slight to moderate. <br />This map unit is used for grazing and wildlife habitat. <br />The soils of this map unit provide a good source of topsoil to <br />an average depth of 6" inches. Structureless, infertile horizons below <br />this depth are unsuitable for the purpose of topsoiling. <br />2-292 <br />