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<br />30R--Ulm-Renohill Clay Loam, 9 to 15 Percent Slopes <br />• nRAFT <br />2-77, AP <br />These strcngly sloping soils are on sideslopee and convex ridges. <br />The average annual precipitation is about 17 inchea. Frost free season <br />is 125 to 140 days, and mean annual temperature is about 47° F. Eleva- <br />tion ranges from 5200 to 6200 feet. Slopes are 9 to 15 percent. Ulm, <br />9 to 15 percent clay loam, makes up about 60 percent of the unit. iteno- <br />hill, 9 to 15 percent loam, makes up about 30 percent of the unit. The <br />Ulm soils extend greater than 40 inches from the surface before encoun- <br />tering shale while Renohill soils extend 20 to 40 inches from the surface <br />to shale. ' <br />Included are small areas of Denver clay loam, 9 to 15 percent <br />slopes, which have darker surface and subsoil. Also included are areas <br />of gravelly and cobbly surface layers which frequently occupy knob-like <br />positions on ridge crests. <br />The Ulm soil is a deep, well drained soil. It formed in calcareous <br />clay loam materials derived from weathered interbedded shales. <br />Typically the surface layer is brown, clay loam about 5 inches <br />thick. The subsoil is brown, mildly alkaline, clay loam about 19 inches <br />thick. The under],ying material is yellowish brown, moderately alkaline <br />light clay loam extending to 60 inches or more. <br />Permeability is slox. Effective rooting depth is 60 inches or more. <br />Available water capacity is high. Surface runoff is rapid, water erosion <br />hazard is high, and wind erosion hazard is moderate. Shrink-swell poten- <br />tial is high. <br />The Renohill soil is a moderately deep, well drained soil. It formed <br />in calcareous clay loam material derived from weathered interbedded shale. <br />Typically the surface layer is a broxn loam about 5 inches thick.. <br />The. subsoil is a dark grayish brown heavy clay loam about 15 inches thick. <br />The Underlying material is a light yelloxish brown moderately alkaline <br />clay loam about 16 inches thick. At depths of 20 to 40 inches is inter- <br />bedded clay ahsle. <br />Permeability is slow. Bffective rooting is 20 to 40 inchea. Avail- <br />able water capacity is high. Surface runoff is rapid, water erosion <br />hazard is high, and wind erosion hazard is moderate. Shrink-swell poten- <br />tial is moderate. <br />These soils are used mainly for grazing. They are not suited for <br />cropland. Areas in cropland are best reseeded to grass. <br />II <br />`~ <br />i' <br />