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<br /> <br />" '<'M~f'79 <br />l(l,500-9,OOO feet. ^.g(~ aTlllu;t.l prccl.pilation l.s ]f).lnclws; soU <br /> <br />moisture regime 1s ilridic; average annual solI temperature is less than <br /> <br />47'F, frigid, and the frost-free season is 100-120 days. <br /> <br />The association has about 70 percent Borollic Camborthids, 25 percent <br /> <br />Aridic Argiborolls and 5 percent of unidentified minor soils located in <br /> <br />southeastern Moffat and west-central Routt Counties, <br /> <br />Borollic Camborthids are moderately deep, well-drained soils on <br /> <br />residual sedimentary rocks, Typically they have a thin, dark-colored, loamy <br /> <br />surface layer, Al horizon, less than 7 inches thick, The subsoil, 10-36 <br /> <br />inch layer, B2 horizon. is a light-colored clayey material, calcareous in <br /> <br />the lower part. the substratum is fractured bedrock, This soil has slow <br /> <br />permeability; effective rooting depth is 20-40 inches, Available water <br /> <br />capacity is moderate to high; surface runoff is rapid and erosion hazard <br /> <br />is high, <br /> <br />Aridic Argiborolls are deep, well-drained soils on sedimentary rocks. <br /> <br />Typically they have a thick, dark-colored, loamy surface layer, Al horizons, <br /> <br />7-20 inches thick, The subsoil, 10-40 inch layer, B2 horizons, is a dark <br /> <br />to light-colored loamy material, The substratum is fractured bedrock, <br /> <br />This soil has a slow permeability; effective rooting depth is 40-60 inches. <br /> <br />i' <br /> <br />Available water capacity is high; surface runoff is rapid, and erosion <br /> <br />hazard is moderate to high, <br /> <br />I <br /> <br />Sediment yield from this association is 0.2-1,0 acre-feet/square <br /> <br />mile/year. These soils are used for.dry cropland, range, wildlife and <br /> <br />small areas of irrigated cropland in stream bottoms. General vegetative <br /> <br />type is a combination of mountain shrub and bottom, Reclamation potential <br />I <br /> <br />is good, <br /> <br />.5 <br /> <br />- <br /> <br />