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134 Soil Survey of <br />roots; common very fine and fine tubular pores; few <br />fine soft masses of carbonate; violently <br />effervescent; moderately alkaline. <br />Range in Characteristics <br />Depth to the base of the argillic horizon: 11 to 20 inches <br />Depth to calcareous material: 10 to 20 inches <br />A horizon: <br />Hue -10YR <br />Value -5 to 7 dry, 3 or 4 moist <br />Chroma -2 or 3 <br />Texture of the fine -earth fraction —loam <br />Fine -earth fraction -15 to 22 percent clay <br />Reaction — neutral or slightly alkaline <br />Bt horizon: <br />Hue -10YR <br />Value -5 or 6 dry, 4 or 5 moist <br />Chroma -2 to 4 <br />Texture of the fine -earth fraction —clay loam <br />Fine -earth fraction -27 to 33 percent clay <br />Reaction — neutral or slightly alkaline <br />Bk or C horizon: <br />Hue -10YR <br />Value-6 or 7 dry, 5 or 6 moist <br />Chroma -2 to 4 <br />Texture of the fine -earth fraction —clay loam or <br />loam <br />Fine -earth fraction -25 to 31 percent clay <br />Calcium carbonate equivalent -5 to 15 percent <br />Reaction — moderately alkaline or strongly alkaline <br />Glenberg Series <br />Depth class: Very deep <br />Drainage class: Well drained <br />Permeability: Moderately rapid <br />Landform: Flood plains <br />Parent material: Alluvium <br />Slope range: 0 to 4 percent <br />Average annual precipitation: 14 to 17 inches <br />Average annual air temperature: 48 to 51 degrees F <br />Frost -free period: 145 to 152 days <br />Taxonomic classification: Coarse - loamy, mixed, <br />superactive, calcareous, mesic Ustic Torrifluvents <br />Typical Pedon <br />Glenberg fine sandy loam, in an area of Glenberg, <br />rarely flooded - Bankard, occasionally flooded, complex, <br />0 to 3 percent slopes, about 1,850 feet south and <br />1,890 feet east of the northwest corner of sec. 17, T. 7 <br />S., R.44 W.; USGS Burlington, Colorado, NE, <br />topographic quadrangle; lat. 39 degrees 26 minutes 29 <br />seconds N. and long. 102 degrees 20 minutes 43 <br />seconds W. <br />A -0 to 4 inches; light yellowish brown (10YR 6/4) fine <br />sandy loam, dark brown (10YR 3/3) moist; weak <br />fine granular structure; soft, very friable, nonsticky <br />and nonplastic; many very fine and fine roots; <br />slightly alkaline; clear smooth boundary. <br />AC-4 to 13 inches; light yellowish brown (10YR 6/4) <br />fine sandy loam, dark brown (10YR 3/3) moist; <br />weak medium subangular blocky structure; soft, <br />very friable, nonsticky and nonplastic; many very <br />fine and fine roots; slightly effervescent; <br />moderately alkaline; gradual smooth boundary. <br />C1 -13 to 21 inches; pale brown (10YR 6/3) sandy <br />loam, brown (10YR 4/3) moist; massive; soft, <br />very friable, nonsticky and nonplastic; few fine <br />roots; strongly effervescent; 1 percent gravel; <br />strongly alkaline; gradual smooth boundary. <br />C2 -21 to 60 inches; pale brown (10YR 6/3) loamy <br />sand, brown (10YR 4/3) moist; single grain; <br />loose, nonsticky and nonplastic; slightly <br />effervescent; 5 percent gravel; moderately alkaline. <br />Range in Characteristics <br />Depth to calcareous material: 0 to 5 inches <br />Other features: Some pedons do not have an <br />AC horizon. <br />A horizon: <br />Hue -10YR <br />Value -5 or 6 dry, 3 or 4 moist <br />Chroma -2 to 4 <br />Texture of the fine -earth fraction —fine sandy loam <br />or sandy loam <br />Fine -earth fraction -10 to 18 percent clay <br />Calcium carbonate equivalent -0 to 3 percent <br />Reaction — slightly alkaline or moderately alkaline <br />Other features —a buried A horizon in some pedons <br />C horizon: <br />Hue -10YR <br />Value -5 to 7 dry, 4 or 5 moist <br />Chroma -2 or 3 <br />Texture of the fine -earth fraction —fine sandy loam, <br />sandy loam, loamy sand <br />Fine -earth fraction -8 to 18 percent clay <br />Calcium carbonate equivalent -1 to 10 percent <br />Reaction — moderately alkaline or strongly alkaline <br />Goshen Series <br />Depth class: Very deep <br />Drainage class: Well drained <br />Permeability.: Moderate <br />