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Official Series Description- LOON Series • Page 2 of 2 <br /> ' degrees F., and mean summer soil temperature ranges from 59 to 78 degrees F. These <br /> soils are moist in some part of the soil moisture control section for 60 consecutive <br /> days when the soil temperature at 20 inches is 41 degrees R, or greater. <br /> The A horizon has hue of 5Y through I OYR,value of 5 through 7 dry, 3 through 5 <br /> moist, and chroma of 2 or 3. It usually has fine granular structure with the <br /> exception of the surface 1/4 to 1/2 inch, which is usually platy and vesicular. The <br /> A and AC horizons are mildly alkaline through strongly alkaline. <br /> ' The C horizon has hue of IOYR through 5Y. Calcium carbonate equivalent ranges from <br /> less than 1 to about 5 percent with visible calcium carbonate occurring inconsistently as to amount <br /> and depth. A few crystals of calcium sulfate are present <br /> ' in some pedons. This horizon is moderately alkaline or strongly alkaline. Textures <br /> are silty clay, clay, or heavy silty clay loam. <br /> COMPETING SERIES: These are the Bahl, Baldfield,Befar, and Petrie series. The <br /> Baldfield and Befar soils are dry in the soil moisture control section less than one- <br /> half of the time when the soil temperature at 20 inches is greater than 41 degrees F. <br /> The Bahl soils are not moist in some part of the soil moisture control section for as <br /> long as 60 consecutive days when the soil temperature at 20 inches is 41 degrees F., <br /> ' which occurs on about April 24. The Petrie soils have 15 to 40 percent ESP <br /> throughout the particle size control section. <br /> ' GEOGRAPHIC SETTING: Limon soils are on flood plains and alluvial fans. Slopes range <br /> from 0 to 12 percent. These soils formed in alluvial deposits derived primarily from <br /> clay shales. At the type location the average annual precipitation is I 1 to 15 <br /> inches, with peak periods of precipitation during the spring and early summer. <br /> Average annual temperature is 48 to 53 degrees F., and the average summer temperature <br /> is 69 degrees. <br /> ' GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Gaynor soils and the <br /> Samsil <br /> soils. Samsil soils have bedrock at a depth of less than 20 inches. <br /> DRAINAGE AND PERMEABHdTY: Well drained; slow runoff, slow permeability. <br /> USE AND VEGETATION: These soils are used primarily as native pastureland. They are <br /> irrigated in some small areas. Native vegetation is short grasses, western <br /> ' wheatgrass, sage, and cactus. <br /> DISTRIBUTION AND EXTENT: Eastern Colorado, southeastern Wyoming, and probably <br /> northeastern New Mexico. The series is of moderate extent. <br /> MLRA OFFICE RESPONSIBLE: Salina,Kansas <br /> SERIES ESTABLISHED: Johnson County(Southern Johnson Area), Wyoming, 1971. <br /> National Cooperative Soil Survey <br /> ' U.S.A. <br /> 1 <br />