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vuaanru .aa.aaw swan aNuvu - •riu ~ivu~va~ ucllGJ Cage L Ul J • • weight. Exchangeable sodium ranges from 0 to 15 percent in a majority of subhorizons of the control section. Conductivity ranges from 0 to 14 millimhos in most subhorizons of the control section. Continuous subhorizons of genetically concentrated visible secondary calcium carbonate and/or sulfate do occur above a depth of 40 inches although visible calcium carbonate and/or sulfate occurs uniformly throughout the profile as a natural feature of the parent material. The parficle- size control section is usually silt loam, loam, silty clay loam or clay loam but clay ranges from 18 to 35 percent, silt from 30 to 70 percent and sand from 5 to 40 percent with less than 15 percent being fine or coarser sand. Rock fragments range from 0 to about 5 percent and aze mainly 1/4 to 2 inches in diameter. In a majority of subhorizons above the bedrock the calcium carbonate equivalent of the whole soil including rock fragments less than 2 inches in diameter ranges from 10 to 39 percent and remains constant or increases with depth. The A horizon has hue of SY through 7.SYR, value of 5 through 8, 3 through 7 moist, and chroma of 1 through On It is mildly alkaline or moderately alkaline. The C horizon has hue of SY through 75YR, value of 6 or 7 dry, 5 or 6 moist, and chroma of 2 through 4. This horizon is moderately alkaline or strongly alkaline. Calcium carbonate equivalent of the fine earth ranges from 8 to about 39 percent. COMPETING SERIES: These are the Bainville, Colbv, Manvel, and Rocker Ford series Bainville soils have a pazalithic contact at a depth of 20 inches or less and contain less calcium carbonate. Co]by, Manvel, and Rocky Ford soils lack a paralithic contact at a depth of less than 40 inches. GEOGRAPHIC SETTING: The Minnequa soils are on hills, ridges, and side slopes. Slopes range from 0 to 30 percent. The soil formed in moderately thin, medium to moderately fine textured, very limy material weathered from chalk, marl, limestone, and limy sedimentary rocks. At the type location, the mean annual precipitation ranges from 11 to 14 inches with peak periods of precipitation in the spring and early summer months. Mean annual temperature is 49 to 54 degrees F., and mean summer temperature is 70 degrees F. GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Manvel soils and the Penrose soils. Penrose soils have bedrock at a depth of ] 0 to 20 inches. Manvel, Minnequa, and Penrose soils often occur in toposequence. DRAINAGE AND PERMEABILITY: Well drained; medium or rapid runoff; moderate to slow permeability. USE AND VEGETATION: Used as grazing land or as dry or irrigated cropland. Native vegetation is blue grams, buffalograss, sage, cactus, and snakeweed. BISTRIBUTION AND EXTENT: Eastern and south central Colorado and western South Dakota also adjacent parts of Kansas and Nebraska. The series is of moderate extent. MLRA OFFICE RESPONSIBLE: Salina, Kansas SERIES ESTABLISHED: Arkansas Valley Area, Colorado, 1926. http://www.statlab.instate.edu/soils/osd/dat/M/MINNEQUA.html 6/25/02