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. -- V <br />• <br />• ~ 2/71 <br />I <br />I ': <br />JCI+F Aaberg-Waybe silty clay loams, 25 to 65 percent slopes, These <br />shallow and moderately deep, well drained soils are on sideslopes and <br />ridge crests at elevations of 6,700 to 8,400 feet. They formed in <br />material weathered from shale and siltstone. The average annual pre- <br />cipitation is about 18 to 22 inches, the average annual air temperature <br />is about 37 to 40 degrees F, and the frost-free season is 40 to 65 days. <br />The Aaberg soil makes up about 50 percent and the Waybe soil makes up <br />about 40 percent of this complex. Small areas of Binco silty clay loam <br />with stones on the surface and rock outcrop are included in this unit. <br />Typically the Aaberg soil has a grayish brown silty clay surface <br />layer about 2 inches thick. The subsoil is pale brown silty clay <br />~, about 30 inches thick. The substratum is light yellowish brown silty <br />clay about 3 inches thick and overlies soft shale bedrock at a depth <br />of 35 inches. <br />Permeability of the Aaberg soil is very slow. Available water <br />cai~acity is low. Effective rooting depth is 20 to 40 inches. Surface <br />runoff is rapid and erosion hazard is high from water. <br />Typically the Waybe soil has a light brownish gray silty clay loam <br />surface layer about 4 inches thick. The lower Dart of the surface layer <br />is light brownish gray silty clay loam about 3 inches thick, The <br />underlying material is highly weathered shale material about 10 inches <br />thick and overlies partially weathered shale at a depth of 17 inches. <br /> <br />