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<br />• <br />• <br />• <br />• <br />• <br />(102) Perna-Hesperus complex, 25 to 65 percent slopes - Contd. <br />This unit is 45 percent Perna and 30 percent Hesperus. Also in this <br />unit is about 25 percent minor soils. The components of this unit are <br />so intricately intermingled that it was not practical to map them sepa- <br />rately at the scale used. <br />The Perna soil is deep and well drained. It formed in alluvial de- <br />posits. Typically, the surface layer is daik grayish brova very cobbly <br />loam about 11 inches thick. The upper 19 inches of the underlying; <br />material is light yellowish brown extremely cobbly sandy loam. The <br />lower part to a depth of 60 inches is light yellowish brown. extremely+ <br />cobbly loam sand. <br /> <br />Permeability of the Perna soil is moderately rapid. Available water <br />capacity is low. Effective rooting depth is 60 inches or more. Runoff. <br />is rapid, and the hazard of water erosion is moderate. <br />The Hesperus soil is deep and well drained. It formed in material <br />weathered from sandstone. Typically, the surface layer is dark brown. <br />loam about 10 inches thick. The upper 8 inches of the aubaoil is dark <br />brown clay loam. The lower 31 inches is yellowish brown clay loam. The <br />substratum to a depth of 60 inches is yellowish brown sandy clap loam. <br />Permeability of the Hesperus soil is moderately slow. Available water <br />capacity is high. Effective rooting depth is 60 inches or more. RuAOff <br />is rapid, and the hazard of water erosion is high. <br />Included in this unit are small areas of Savage, Moyerson, and Rock <br />outcrop. <br />This unit is used mainly for livestock grazing and wildlife habitat. <br />