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(SSA) Silas loam, 0 to 3 percent slopes - Contd. <br />• Small areas having 15 to 35 percent by volume cobbles and stones occur. <br />Typically the surface layer is a very dark grayish brown sandy Loam <br />about 14 inches thick. The underlying material is grayish brown sandy <br />clay Ioam to 60 inches or more. Depth to watertable is 40 to 50 inches. <br />Permeability is moderate. Available water capacity is moderate. Effec- <br />tive rooting depth is 60 inches or more, Surface runoff is slow and <br />erosion hazard is slight. <br />(46E) Splitro sandy Loam, 12 to 25 percent slopes. <br />This is a shallow, somewhat excessively drained soil on strongly sloping <br />to moderately steep mountain sideslopes and ridge crests. It formed in <br />sandstone residuum. <br />• <br />Included in this unit are Winevada (53D) fine sandy loam soils with more <br />than 35 percent rock fragments throughout, and Coutis (34E) fine sandy <br />Ioam. Occasional areas of Aock outcrop (99) occur. <br />Typically the surface layers are very dark grayish brown and dark gray- <br />ish brown sandy loams about 18 inches thick over fractured hard sand- <br />stone. <br />Permeability is moderately rapid. Effective rooting depth ranges from <br />10 to 20 inches. Available water capacity is very low. Surface runoff <br />is medium, erosion hazard is high from wind and moderate from water. <br />46F, 25 to 65 percent 'slopes; is on' moderately to very steep mountain• <br />sideslopes. <br />• <br />