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Page 4 <br />' Billings soils are found in association with Chipeta, Persayo, and Killpack <br />soils. These soils are shallower and less developed than the Billings soils. <br />The following is a typical pedon representing Billings silty clay loam, 0 to <br />6 percent slopes: <br />Al - 0 to 4 inches; light brownish gray (2.SY 6/2) silty clay <br />loam, dark grayish brown (2.SY 4/2) moist; weak fine <br />platy structure; slightly hard, friable, sticky and <br />plastic; calcareous; moderately alkaline; gradual <br />smooth boundary (2 to 6 inches thick). <br />1 <br />AC - 4 to 16 inches; light brownish gray (2.SY 6/2) silty <br />clay loam, dark grayish brown (2.SY 4/2) moist; weak <br />fine subangular blocky structure; hard, firm, very <br />sticky and very plastic; calcareous; moderately alka- <br />line; gradual wavy boundary (10 to 14 inches thick). <br />1 C - 16 to 60 inches; light brownish gray (2.SY 6/2) strati- <br />fied clay loam and silty clay loam, dark grayish brown <br />(2.SY 4/2) moist; massive; hard, firm, very sticky and <br />very plastic; few roots; few very fine pores; small <br />l gypsum crystals; fine inconsistent seams of calcium <br />1 carbonates; calcareous; moderately alkaline. <br />^ Billings soils are unsuitable for nonirrigated crops because annual pre- <br />cipitation is low and has poor seasonal distribution. However, non- <br />irrigated grass pasture is suited to this soil provided livestock grazing <br />is properly managed. Native pasture can produce from 500 to 900 pounds <br />] per acre of air dry forage. <br />Table 1, Physical and Chemical Soil Properties, presents the SCS's analysis <br />of the soil series in the vicinity of the disposal area. <br />~ The Industrial Soils and Vegetation Map presents the SCS's soils mapping <br />I unit boundaries in the vicinity of the disposal site. <br />