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<br />' percent slopes: <br />Al - 0 to 4 inches; light brownish gray (2.SY 6/2) silty <br />' clay, dark grayish brown (2.SY 4/2) moist, moderate <br />medium granular structure; slightly hard, firm, sticky <br />' and plastic; calcareous; mildly alkaline; clear wavy <br />boundary. (3 to 6 inches thick). <br />Clcs - 4 to 15 inches; light brownish gray (2.SY 6/2) silty <br />' clay, dark grayish brown (2.SY 4/2) moist; weak sub- <br />angular blocky structure that parts to moderate fine <br />angular blocky; hard, firm, very sticky and very plastic; <br />few to many fine gypsum crystals; 20 percent soft shale <br />fragments; calcareous; moderately alkaline; gradual wavy <br />' boundary. (7 to 14 inches thick). <br />' C2r - 15 inches; partially weathered olic gray saline shale. <br />Page 3 <br />' Chipeta soils are unsuitable for cropland, due to the shallow soil depth, <br />low available water and alkaline soils. Pasture grass planting are expected <br />' to produce only fair stands of grass. Production is low, approximately 200 <br />to 500 pounds per acre of air dry forage. <br />Billings silty clay loam was formed in silty alluvium and is located on fans <br />and flood plains. The soil has gullies five to ten feet deep and 10 to 25 <br />feet wide composing approximately five percent of the soil mapping unit. The <br />surface layer is a light brownish gray (2.SY 6/2) silty clay loam approximately <br />' four inches thick. The underlying material, to a depth of 60 inches, is a <br />light brownish gray (2.SY 6/2), stratified silty clay loam and clay loam. <br />Permeability is slow and available water capacity is high. Effective rooting <br />' depth is approximately 60 inches or more. Surface runoff is medium to rapid. <br />The hazard of erosion from wind is moderate and from water is high. <br />' The elevation and climatic conditions are similar to those described for <br />the Chipeta soil series. <br />