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The most limiting factors for using this soil for topsoil are the high <br /> content of coarse fragments in the C horizon and the shallow soil depth. <br /> Coarse fragment- contents range from 15 to 40 percent for the two sampled <br /> pedons (Table 9-4-4) . Based upon two profiles, about four inches of <br /> suitable topsoil is available for salvage within Map Unit 3. <br /> Map Unit 4- Shavano Variant Sandy Loam, 2 to 15 Percent Slopes <br /> This map unit is associated with the gently to moderately sloping upland <br /> benches and ridgetops. Vegetation consists primarily of big sagebrush <br /> and rangeland grasses. Typically, this soil overlies fractured <br /> yellowish-brown sandstone at depths ranging from 8 to 15 inches. This <br /> soil represents 3.0 percent of the study area (Table 9-4-3) . <br /> This soil has the most profile development and best topsoil in the study <br /> area (Tables 9-4-2 and 9-4-5) . Soil reactions are neutral and <br /> carbonates have generally leached from the A and B horizons. A <br /> structural Iambic B horizon with a slight clay accumulation is also <br /> present. Coarse fragment content typically ranges between 0 and 20 <br /> percent for the A, B, and C horizons. Based upon six profiles (Table <br /> 9-4-4) , about 12 inches of' suitable topsoil is available for salvage <br /> within Map Unit 4. <br /> Map Unit 5 - Shavano Variant Loam - 2 to 15 Percent Slopes <br /> This map unit is associated with the gently to moderately sloping upland <br /> benches and ridgetops. Vegetation consists primarily of big sagebrush <br /> and rangeland grasses. Typically, this soil overlies soft light gray <br /> sandy shale and siltstone at depths ranging from 10 to 17 inches. This <br /> soil represents 3.2 percent of the study area (Table 9-4-3) . <br /> This soil , like Map Unit 4, also has moderate profile development and <br /> fairly good topsoil reserves. The surface A and Iambic B horizons have <br /> a neutral reaction and are free of carbonates (Tables 9-4-2 and 9-4-5) . <br /> Clay contents in the B and C horizons are marginally suitable, averaging <br /> 42 percent. However, associated saturation percentages are highly <br /> suitable (49 percent) . Based upon seven profiles (Table 9-4-4) , about <br /> 17 inches of suitable topsoil is available for salvage within Map Unit <br /> 5. <br /> 01-4-23 Revised 11/01-1/P5 <br />