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10(13/2016 Official Series Description- MANVEL Series <br />USE AND VEGETATION: They are used as rangeland, nonirrigated and irrigated cropland. Native vegetation <br />is mainly blue grama, galleta, western wheatgrass, cactus, and needlegrass. <br />DISTRIBUTION AND EXTENT: Southern and central Colorado, parts of Kansas, Nebraska and South <br />Dakota, LRR G, MLRA 69, 72, 60A and 64. The series is extensive. <br />MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado <br />SERIES ESTABLISHED: Arkansas Valley Area, Colorado, 1926. <br />REMARKS: Diagnostic horizons and features in this pedons are: <br />Particle size control section: 25 to 100 centimeters (10 to 40 inches). (Bkl, Bk2, and part of the Bk3 horizons) <br />Ochric epipedon: the zone from 0 to 18 centimeters (0 to 7 inches). (A horizon) <br />Calcic horizon: 18 to 64 centimeters (7 to 25 inches) <br />Other features: calcium carbonate equivalent: 15 to 40 percent <br />Moisture regime: aridic bordering on ustic. <br />The assignment of the cation -exchange activity class is inferred from lab data from similar soils in the <br />surrounding area. <br />LAN 12/2012 The previous classification of calcareous Ustic Torriorthents became obsolete with the Eleventh <br />Edition to Keys to Soil Taxonomy. Based on a field project this update moves the type location from Las <br />Animas County, Colorado to Pueblo County, Colorado and changes the Taxonomic class to Fine -silty, mixed, <br />superactive, mesic Ustic Haplocalcids. <br />Taxonomic Version: Eleventh Edition, 2010. <br />National Cooperative Soil Survey <br />U.S.A. <br />httpsJ/soilseries.sc.egov.usda.gov/OSD_Docs/MIMANVEL.html 313