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Official Series Description -LAS Series <br />Page 2 of 2 <br />degrees F. The Werlog soils lack stratification above 40 inches. Angelus soils are fine-silty. Caruso, Lesho, Sweetwater, <br />and Uncompahgre soils have mollic epipedons. In addition, Lesho and Sweetwater soils have contrasting textures and are <br />thermic; Uncompahgre soils are wetter; and Wann soils are coarse-loamy. Las Animas soils are wetter and have coarse- <br />loamy textures. <br />GEOGRAPHIC SETTING: Las soils are on nearly level flood plains and low stream terraces. The soil formed in light <br />colored, calcareous, medium textured alluvium. Slope gradients are 0 to 1 percent. Mean annual precipitation ranges from <br />14 to 19 inches, and the mean annual temperature ranges from 52 to 57 degrees F. Thornthwaite Annual P-E Index ranges <br />from 19 to 32. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Las Animas soils and the better drained <br />Bridgeport and McCook soils on associated higher terraces. <br />DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is slow. Permeability is moderately slow. <br />These soils flood occasionally. The water table generally fluctuates between 3 to 6 feet below the surface but comes <br />within 2 to 3 feet of the surface in wet years. <br />USE AND VEGETATION: Mostly cropped to wheat and grain sorghum. Native vegetation is mid and tall grasses. <br />DISTRIBUTION AND EXTENT: Western Kansas and adjacent areas of Colorado and Nebraska. The series is of <br />moderate extent. <br />MLRA OFFICE RESPONSIBLE: Salina, Kansas <br />SERIES ESTABLISHED: Hamilton County, Kansas, 1959. <br />REMARKS: The horizons and features diagnostic for the typical pedon are organic carbon content that decreases <br />,irregularly with depth. <br />National Cooperative Soil Survey <br />U.S.A. <br />1 ] /02/2006 <br />.nres.usda.gov/osd/dat/L/LAS.html <br />