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Kit Carson County, Colorado 133 <br />loam, very dark grayish brown (10YR 3/2) moist; <br />weak fine granular structure; soft, very friable, <br />nonsticky and nonplastic; common very fine and <br />fine roots; 15 percent gravel; neutral; abrupt <br />smooth boundary. <br />Bt-4 to 12 inches; brown (10YR 4/3) gravelly sandy <br />clay loam, dark brown (10YR 3/3) moist; weak <br />medium prismatic structure parting to moderate <br />medium subangular blocky; slightly hard, friable, <br />slightly sticky and slightly plastic; few fine tubular <br />pores; few faint clay films on faces of peds; 25 <br />percent gravel; neutral; clear smooth boundary. <br />BC -12 to 15 inches; brown (10YR 4/3) gravelly sandy <br />loam, dark brown (10YR 3/3) moist; weak medium <br />subangular blocky structure; soft, very friable, <br />slightly sticky and nonplastic; few very fine roots; <br />30 percent gravel; slightly alkaline; clear smooth <br />boundary. <br />2C1 -15 to 22 inches; yellowish brown (10YR 5/4) <br />gravelly sand, dark yellowish brown (10YR 4/4) <br />moist; single grain; loose, nonsticky and <br />nonplastic; 35 percent gravel; slightly alkaline; <br />gradual wavy boundary. <br />2C2 -22 to 60 inches; brown (10YR 5/3) gravelly sand, <br />brown (10YR 4/3) moist; single grain; loose, <br />nonsticky and nonplastic; 15 percent gravel; <br />slightly alkaline. <br />Range in Characteristics <br />Thickness of the mollic epipedon: 9 to 15 inches <br />Depth to the base of the argillic horizon: 9 to 12 inches <br />Depth to contrasting gravelly or very gravelly sand: 12 to <br />20 inches <br />A horizon: <br />Hue -10YR <br />Value -4 or 5 dry, 2 or 3 moist <br />Chroma -2 or 3 <br />Texture of the fine -earth fraction —loam or gravelly <br />sandy loam <br />Reaction — neutral or slightly alkaline <br />Bt horizon: <br />Hue -10YR <br />Value -4 to 6 dry, 3 or 4 moist <br />Chroma -2 or 3 <br />Texture of the fine -earth fraction— gravelly sandy <br />clay loam or sandy clay loam <br />Reaction — neutral or slightly alkaline <br />2C horizon: <br />Hue -10YR <br />Value -5 to 7 dry, 4 or 5 moist <br />Chroma -3 or4 <br />Texture of the fine -earth fraction — gravelly sand, <br />very gravelly sand, or gravelly loamy sand <br />Reaction — neutral or slightly alkaline <br />Other features —lime in some pedons <br />Fort Collins Series <br />Depth class: Very deep <br />Drainage class: Well drained <br />Permeability: Moderate <br />Landform: Hills and plains <br />Parent material: Eolian material over alluvium <br />Slope range: 1 to 9 percent <br />Average annual precipitation: 13 to 16 inches <br />Average annual air temperature: 47 to 49 degrees F <br />Frost -free period: 145 to 148 days <br />Taxonomic classification: Fine - loamy, mixed, <br />superactive, mesic Aridic Haplustalfs <br />Typical Pedon <br />Fort Collins loam, 1 to 3 percent slopes, about 1,950 <br />feet north and 1,420 feet west of the southeast corner <br />of sec. 36, T. 11 S., R. 51 W.; USGS Bellyache Creek, <br />Colorado, topographic quadrangle; lat. 39 degrees 2 <br />minutes 42 seconds N. and long. 103 degrees 3 <br />minutes 19 seconds W. <br />A-0 to 5 inches; brown (10YR 5/3) loam, brown (10YR <br />4/3) moist; moderate fine and medium granular <br />structure; soft, very friable, slightly sticky and <br />slightly plastic; common very fine and fine roots; <br />slightly alkaline; clear smooth boundary. <br />BA -5 to 9 inches; brown (10YR 5/3) loam, brown <br />(10YR 4/3) moist; moderate fine and medium <br />subangular blocky structure; slightly hard, firm, <br />slightly sticky and slightly plastic; common very <br />fine and fine roots; few fine tubular pores; slightly <br />alkaline; clear smooth boundary. <br />Bt -9 to 19 inches; brown (10YR 5/3) clay loam, brown <br />(10YR 4/3) moist; moderate medium prismatic <br />structure parting to moderate medium subangular <br />blocky; slightly hard, firm, moderately sticky and <br />moderately plastic; few very fine and fine roots; <br />few fine tubular pores; common distinct brown <br />(10YR 4/3) clay films on faces of peds; slightly <br />alkaline; gradual smooth boundary. <br />BCk -19 to 26 inches; light yellowish brown (10YR <br />6/4) clay loam, brown (10YR 5/3) moist; weak <br />medium subangular blocky structure; hard, firm, <br />moderately sticky and moderately plastic; few fine <br />roots; common very fine and fine tubular pores; <br />strongly effervescent; moderately alkaline; gradual <br />smooth boundary. <br />Ck -26 to 60 inches; light gray (10YR 7/2) loam, <br />yellowish brown (10YR 5/4) moist; massive; soft, <br />friable, slightly sticky and slightly plastic; few fine <br />