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• Conservation Service report, "military impact areas". <br />Presumably, this means on Fort Carson the soil is used for <br />shelling by tanks and bombing practice from aircraft. <br />The native vegetation is highly diverse (reflecting the <br />diverse soil types) and includes western wheatgrass, blue <br />grama, side-oats grama, little bluestem, skunkbush sumac, <br />fourwing saltbush, buckwheat, alkali sacaton, galleta, as <br />well as species of Astragalus that are restricted to <br />selenium bearing so i'~Revegatation tends to be very <br />difficult because of excessive permeability. Under normal <br />conditions these soils can produce about 1000 pounds per <br />acre (dry weight), but maintaining such productivity <br />requires extremely careful implementation of complex <br />management practices. <br />Mechanically, these soils are unsuited for almost any <br />kind of use including roads, buildings, excavations, or <br />sanitary landfills and facilities. It is a poor source of <br />topsoil. At best it is only fair for use as a grassed <br />wildlife habitat. <br />An analysis of a typical profile reveals a gravelly to <br />very gravelly loam to clay loam throughout. However, the <br />percentage passing sieve number 200 can be as high as 95% <br />• (razor soils) or as low as 15Y. Permeability of the <br />gravelly areas can be as high as 20 inches per hour while in <br />the clay areas it can be 0.06 inches per hour. Available <br />water capacity ranges from 0.03 to 0.18 inches per inch. <br />The pH ranges from 6.6 to 8.4 and the salinity is less than <br />2 mmohs/cm. <br />Below is a description of a typical profile of the <br />Schamber and the Razor soils. It is difficult to tell where <br />typical soils occur on the site because the variation is so <br />great over the entire area. <br />Schamber Series: <br />The Schamber series consists of deep, well drained <br />soils that formed in material weathered from gravelly <br />alluvium. These soils are on old terrace breaks or <br />remnants. They have slopes of 15 to 50 percent. Average <br />annual precipitation is about 13 inches, and average annual <br />air temperature is about 49 degrees F. <br />Schamber soils are similar to Chaseville and Nelson <br />soils. They are near Razor and Satanta soils. Chaseville <br />soils have hue of 5YR to lOR and are noncalcareous. Nelson <br />soils have less than 15 percent coarse fragments and have <br /> <br />- 31 - <br />