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68 Soil survey <br />slightly plastic; many very fine and fine roots; <br />violently effervescent; moderately alkaline; clear <br />wavy boundary. <br />Cr2 -12 inches; white (10YR 8/1) highly calcareous <br />sandstone, light gray (10YR 7/2) moist; somewhat <br />layered and fractured. <br />The content of rock fragments in the pedon ranges <br />from 0 to 25 percent. Depth to bedrock ranges from 6 to <br />20 inches. <br />The A horizon is fine sandy loam or loam. <br />Colby series <br />The Colby series consists of deep, well drained soils <br />that formed in wind - deposited silt and very fine sand. <br />Colby soils are on irregular plains, low hills, and <br />dissected slopes. Slopes range from 3 to 25 percent. <br />The mean annual precipitation is 16 inches, and the <br />mean annual temperature is 51 degrees F. <br />Colby soils are similar to Kim soils. They are near Kim, <br />Canyon, Keith, and Kuma soils. Kim soils are more than <br />15 percent fine sand or coarser sand in the control <br />section. Canyon soils are shallow. Keith and Kuma soils <br />have a mollic epipedon and a B2t horizon. <br />Typical pedon of Colby silt loam, 3 to 6 percent <br />slopes, in native grass 1 mile east and 1 mile south of <br />Vernon, 75 feet west and 1,700 feet south of the <br />northeast corner of sec. 33, T. 1 S., R. 44 W. <br />A1-0 to 5 inches; light brownish gray (10YR 6/2) silt <br />loam, dark grayish brown (10YR 4/2) moist; weak <br />medium granular structure; soft, very friable, <br />nonsticky and slightly plastic; many very fine and <br />fine roots; weakly effervescent; mildly alkaline; clear <br />smooth boundary. <br />AC -5 to 8 inches; light brownish gray (10YR 6/2) silt <br />loam, dark grayish brown (10YR 4/2) moist; weak <br />coarse subangular blocky structure; slightly hard, <br />very friable, nonsticky and slightly plastic; common <br />very fine and fine roots; strongly effervescent; <br />moderately alkaline; clear wavy boundary. <br />Cl ca -8 to 17 inches; very pale brown (10YR 7/3) silt <br />loam, brown (10YR 5/3) moist; weak coarse <br />subangular blocky structure; slightly hard, very <br />friable, nonsticky and slightly plastic; common very <br />fine and fine roots; fine filaments, threads, and soft <br />masses of segregated lime; violently effervescent; <br />moderately alkaline; gradual smooth boundary. <br />C2ca -17 to 60 inches; very pale brown (10YR 7/3) silt <br />loam, brown (10YR 5/3) moist; massive; slightly <br />hard, very friable, nonsticky and slightly plastic; few <br />very fine and fine roots; violently effervescent; fine <br />filaments, threads, and soft masses of segregated <br />lime; moderately alkaline. <br />In some pedons, lime is leached to a depth of 6 <br />inches. <br />Dioxice series <br />The Dioxice series consists of deep, well drained soils <br />that formed in old alluvium. Dioxice soils are on side <br />slopes of limestone hills and knolls. Slopes range from 3 <br />to 9 percent. The mean annual precipitation is 17 inches, <br />and the mean annual temperature is 51 degrees F. <br />rrd <br />The C2 horizon ranges from silt loam to loam, <br />depending on the content of very fine sand. In the Cca <br />horizon, visible accumulations of carbonates occur as <br />fine filaments, threads, or soft masses. Carbonate <br />accumulations are not visible in all pedons. <br />Dailey series <br />The Dailey series consists of deep, somewhat <br />excessively drained soils that formed in wind - deposited <br />sand. Dailey soils are in sandhill valleys and on sandhills. <br />Slopes are 0 to 6 percent. The mean annual precipitation <br />is 17 inches, and the mean annual temperature is 51 <br />degrees F. <br />Dailey soils are near Valent, Julesburg, Haxtun, and <br />Manter soils. Valent soils have a light- colored surface <br />layer. Julesburg soils have a B2t horizon of coarse sandy <br />loam. Manter soils have a B2t horizon of sandy loam, <br />and they have a calcareous substratum. Haxtun soils <br />have a buried B2tb horizon of sandy clay loam. <br />Typical pedon of Dailey loamy sand, in native grass, 5 <br />miles south and 4 miles east of Yuma, 2,000 feet west <br />and 500 feet east of the southeast corner of sec. 30, T. <br />1 S., R. 47 W. <br />A1-0 to 5 inches; grayish brown (10YR 5/2) loamy <br />sand, very dark grayish brown (10YR 3/2) moist; <br />weak fine granular structure that parts to single <br />grain; soft, very friable; common very fine and fine <br />roots; neutral; clear wavy boundary. <br />AC -5 to 12 inches; dark grayish brown (10YR 4/2) <br />loamy sand, very dark grayish brown (10YR 3/2) <br />moist; weak coarse prismatic structure that parts to <br />single grain; slightly hard, very friable; common very <br />fine and fine roots; very few very thin clay films on <br />vertical faces of peds; neutral; clear wavy boundary. <br />C1 -12 to 25 inches; brown (10YR 5/3) loamy sand, <br />dark brown (10YR 4/3) moist; single grain; loose; <br />few very fine and fine roots; neutral; gradual smooth <br />boundary. <br />C2 -25 to 36 inches; pale brown (10YR 6/3) loamy <br />sand, brown (10YR 5/3) moist; single grain; loose; <br />few very fine roots; neutral; gradual smooth <br />boundary. <br />C3 -36 to 60 inches; pale brown (10YR 6/3) sand, dry <br />or moist; single grain; loose; neutral. <br />The C horizon is loamy sand or sand. In some pedons, <br />a layer of grayish brown sandy loam is below a depth of <br />40 inches. To a depth of 40 inches or more, the soil is <br />neutral or mildly alkaline. <br />