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Soil Profile Description <br />• Mapping Unit 4 <br />Abor silty clay loam <br />The soils of the Abor series are moderately deep, fine textured, and <br />well- drained. They are forming in Mancos shale and occupy upland <br />slopes. The soils of this series are disturbed throughout the area. <br />Abor soils have a dark grayish brown, very friable granular, silty clay <br />surface layer about 3 to 6 inches thick. The B2 horizon is an olive <br />brown silty clay that has moderate angular blocky structure. At depths <br />of 9 to 20 inches or the lower part of the subsoil, is an accumulation <br />of lime. The silty clay substrata is olive brown and contains lime that <br />is visible in seams and streaks. Mancos shale is at a depth of about 30 <br />• inches. <br />When this soil dries it contracts, forming wide and deep cracks. If <br />poorly managed, erosion will be severe. <br />Abor soils are associated with Bulkley soils (10) but differ by having <br />bedrock above 40 inches, having somewhat stronger angular structure in <br />the B2 horizon and perhaps in having slightly higher pH throughout. <br />Alkali sagebrush and wheatgrass are the principal native plants. The <br />soils are productive and the level to sloping areas are suited to crop- <br />land. <br /> <br />-9- <br />