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Kit Carson County, Colorado 141 <br />Average annual precipitation: 15 to 17 inches <br />Average annual air temperature:48 to 50 degrees F <br />Frost -free period: 148 to 152 days <br />Taxonomic classification: Coarse - loamy, mixed, <br />superactive, calcareous, mesic Oxyaquic <br />Ustifluvents <br />Typical Pedon <br />Kitcarson loam, 0 to 2 percent slopes, rarely flooded, <br />about 350 feet north and 350 feet west of the <br />southeast corner of sec. 35, T. 5 S., R. 44 W.; USGS <br />ldalia, Colorado, SW, topographic quadrangle; lat. 39 <br />degrees 33 minutes 53 seconds N. and long. 102 <br />degrees 15 minutes 39 seconds W. <br />Ap1 -0 to 6 inches; grayish brown (10YR 5/2) loam, <br />dark grayish brown (10YR 4/2) moist; weak coarse <br />subangular blocky structure parting to moderate <br />fine and medium subangular blocky; slightly hard, <br />friable, slightly sticky and slightly plastic; common <br />very fine roots; slightly effervescent; moderately <br />alkaline; gradual smooth boundary. <br />Ap2-6 to 15 inches; grayish brown (10YR 5/2) loam, <br />dark grayish brown (10YR 4/2) moist; weak coarse <br />prismatic structure parting to moderate fine and <br />medium subangular blocky; slightly hard, friable, <br />slightly sticky and slightly plastic; common very <br />fine roots; few very fine vesicular pores; slightly <br />effervescent; moderately alkaline; gradual smooth <br />boundary. <br />C1 -15 to 22 inches; pale brown (10YR 6/3) loam, <br />grayish brown (10YR 5/2) moist; massive; soft, <br />very friable, nonsticky and slightly plastic; few very <br />fine roots; common very fine vesicular pores; <br />slightly effervescent; moderately alkaline; clear <br />smooth boundary. <br />C2 -22 to 28 inches; grayish brown (10YR 5/2) silt <br />loam, dark grayish brown (10YR 4/2) moist; few <br />fine faint and common fine yellowish brown (10YR <br />5/6) mottles; moderate coarse prismatic structure <br />parting to moderate fine and medium subangular <br />blocky; slightly hard, friable, slightly sticky and <br />slightly plastic; few very fine roots; common very <br />fine and fine vesicular pores; slightly effervescent; <br />moderately alkaline; abrupt smooth boundary. <br />C3 -28 to 34 inches; dark gray (10YR 4/1) clay loam, <br />very dark gray (10YR 3/1) moist; common fine <br />distinct yellowish brown (10YR 5/6) mottles; <br />moderate medium prismatic structure parting to <br />moderate fine subangular blocky; hard, firm, <br />slightly sticky and slightly plastic; few very fine <br />roots; common very fine and fine vesicular pores; <br />slightly effervescent; moderately alkaline; clear <br />smooth boundary. <br />C4 -34 to 46 inches; pale brown (10YR 6/3) sandy <br />loam, brown (10YR 4/3) moist; few and common <br />fine yellowish brown (10YR 5/6) mottles; massive; <br />soft, very friable, nonsticky and nonplastic; few <br />very fine roots; slightly effervescent; moderately <br />alkaline; gradual smooth boundary. <br />C5 -46 to 60 inches; light yellowish brown (10YR 6/4) <br />sand, brown (10YR 5/3) moist; few fine faint <br />mottles; single grain; loose, nonsticky and <br />nonplastic; slightly effervescent; moderately <br />alkaline. <br />Range in Characteristics <br />Depth to the water table: 22 to 36 inches from March <br />through September in most years <br />Content of organic matter: 0.5 to 2.0 percent in the <br />surface layer and decreasing irregularly with depth; <br />in areas where the moist value and chroma are as <br />dark as 3/3, the horizon is too thin or contains too <br />little organic carbon to meet the requirements for a <br />mollic epipedon. <br />Ap horizon: <br />Hue -10YR <br />Value -5 dry, 3 or 4 moist <br />Chroma -2 or 3 <br />Texture of the fine -earth fraction —loam <br />Fine -earth fraction -16 to 21 percent clay <br />Calcium carbonate equivalent -5 to 10 percent <br />C horizon: <br />Hue -10YR <br />Value -4 to 7 dry, 3 to 5 moist <br />Chroma -1 to 4 <br />Texture of the fine -earth fraction —loam, silt loam, <br />clay loam, fine sandy loam, sandy loam, and <br />sand but averages less than 18 percent clay in <br />the particle -size control section <br />Calcium carbonate equivalent -5 to 15 percent <br />Kuma Series <br />Depth class: Very deep <br />Drainage class: Well drained <br />Permeability: Moderate <br />Landform: Plains <br />Parent material: Loess <br />Slope range: 0 to 3 percent <br />Average annual precipitation: 15 to 17 inches <br />Average annual air temperature: 48 to 51 degrees F <br />Frost -free period: 148 to 152 days <br />Taxonomic classification: Fine - silty, mixed, <br />superactive, mesic Pachic Argiustolls <br />Typical Pedon <br />Kuma silt loam (fig. 10), in an area of Kuma -Keith silt <br />