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• SOIL MAPPING UNIT - TRAVESSILLA-KIM COMPLEX <br />8T - Travessilla-Kim complex, 1 to 9 percent slopes. This map unit is <br />on uplands. The native vegetation is mainly grass. Elevation is 5,500 <br />to 6,200 feet. The average annual precipitation is 11 to 15 inches, the <br />average annual air temperature is 50 to 54 degrees F., and the average <br />frost-free period is 135 to 165 days. <br />This unit is about 70 percent Travessilla channery sandy loam, and about <br />20 percent Kim. fine sandy loam. The Travessilla soil is on ridges and <br />the steeper areas, and the Kim soil is on the more nearly level areas. <br />Included in this unit is about 10 percent sandstone Rock outcrop on <br />ridges. <br />The Travessilla soil is shallow and vell drained. It formed in residuum <br />derived dominantly from sandstone. Typically, the surface layer is <br />• light brownish gray channery sandy loam about 6 inches thick. The <br />substratum is channery sandy loam about 9 inches thick over sandstone <br />bedrock at a depth of 15 inches. The soil is mildly alkaline to a depth <br />of 6 inches and moderately alkaline below that depth. <br />Permeability of the Travessilla soil is moderately rapid. Available <br />valet capacity is very lov. Effective rooting depth is 6 to 20 inches. <br />Runoff is medium, and the hazard of valet erosion is high to very high. <br />The Kim soil is deep and well drained. It formed in alluvium and eolian <br />fine sand and silt derived dominantly from sandstone. Typically, the <br />surface layer is light brownish gray fine sandy loam about 8 inches <br />thick. The substratum to a depth of 60 inches or more is loam. The <br />soil is mildly alkaline to a depth of 8 inches and moderately alkaline <br />below that 'depth. <br />• Permeability of the Kim soil is moderate. Available valet capacity is <br />high. Effective rooting depth is 60 inches or more. Runoff is <br />