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VLL1GlQl JGIIGJ LCJI+llvl1U11 - 1V1111V V 1:L JCIICS Ya1,+C L UL L <br />• • <br />The C horizon has hue of SY through 7.5YR, value of 5 through 7 dry, 4 or 5 moist, and chroma of 2 <br />through 4. It is silt loam or silty clay loam. This horizon ranges from 8.0 to 8.6 and has 10 to 40 percent <br />calcium carbonate equivalent. A large proportion of calcium carbonate in this horizon is in clay-sized <br />particles. <br />COMPETING SERIES: These aze the Bainyille (MT), Colby (KS), Minnequa (CO), Rocky Ford <br />(CO), and Skilak (WY) series. Bainville and Minnequa soils have a paralithic contact at some point <br />above a depth of 40 inches. Colby soils have less than 15 percent calcium carbonate equivalent. Rocky <br />Ford soils have 1 to 10 percent calcium carbonate equivalent in the C horizon and have an overly <br />thickened and enriched Ap horizon. Skilak soils have less than 15 percent calcium carbonate equivalent <br />in their series control section. <br />GEOGRAPHIC SETTING: The Manvel soils are on alluvial fans and foot slopes. Slopes range from 0 <br />to 15 percent. These soils formed in thick very calcareous alluvial fan materials derived from chalk and <br />soft limestones. At the type location the average annual precipitation is 12 to 16 inches with peak <br />periods of precipitation in the spring and eazly summer. Mean annual air temperature is 52 to 57 degrees <br />F., mean summer temperature is 72 degrees F. Elevation is 3,300 to 6,600 feet. Frost-free pereiod ranges <br />from 125 to 160 days. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Minneoua soils and the <br />Tyrone soils. Tyrone soils have a natric horizon. <br />DRAINAGE AND PERMEABILITY: Well drained; medium or rapid runoff; moderate or moderately <br />slow permeability. <br />USE AND VEGETATION: They are used as native pastureland, or for dry or irrigated cropland. <br />Native vegetation is mainly blue grama, sage cactus, and needlegrass. <br />DISTRHiUTION AND EXTENT: Southern and central Colorado. The series is of moderate extent. <br />MLRA OFFICE RESPONSIBLE: Salina, Kansas <br />SERIES ESTABLISHED: Arkansas Valley Area, Colorado, 1926. <br />REMARKS: Last update by the state 10/90. Diagnostic features include an ochric epipedon from 0 to 4 <br />inches. <br />National Cooperative Soil Survey <br />U.S.A. <br />http:(/www.statlab.instate.edu/soils/osd/datlM/MANVEL.html 6!25/02 <br />