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Attachment C LOCATION BANKARD CO KS MT NE NM SD UT WY Established Series Rev. DH/PRF 04/2000 BANKARD SERIES The Bankazd series consists of very deep, well to somewhat excessively drained soils that formed in alluvium from a variety of rocks. Bankard soils aze on flood plains and (ow terraces and have scopes of 0 to 6 percent. The mean annual precipitation is about 14 to 17 inches and the mean annual temperature is about 48 degrees F. TAXONOMIC CLASS: Sandy, mixed, mesic Ustic Torrifluvents TYPICAL PEDON: Bankazd loamy sand - gassland. (Colors are for dry soil unless otherwise stated.) A--O to 5 inches; light brownish gray (2.SY 6/2) loamy sand, gayish brown (2.SY 5/2) moist; weak fine ganulaz structure; soft, very friable; slightly effervescent; moderately alkaline (pH. 8.0); clear smooth boundary. (4 to 8 inches thick) C--S to 80 inches; light yellowish brown (2.SY 6/3) loamy very fine sand stratified with thin layers of sand, sandy loam and loam, light olive brown (2.5Y 5/3) moist; the weighted average texture is loamy fine sand; single grain; soft, very friable, strongly effervescent; moderately alkaline (pH 8.2). TYPE LOCATION: Morgan County, Colorado; 100 feet south and 210 feet east of the northwest comer of Sec. 30, T. 4 N., R. 56 W. RANGE IN CHARACTERISTICS: Depth to cazbonates: 0 to 8 inches Mean annual soil temperature: 47 to 53 degrees F. Mean annual summer soil temperature: 60 to 78 degees F. Moisture control section: moist in some or all parts for as long as 60 consecutive days when the soil temperature at 20 inches is 41 degees F., which occurs in April Organic carbon: decreases irregularly with depth Particle size control section: loamy fine sand predominates above 40 inches -variable in texture due to stratification Rock fragments: 0 to 25 percent by volume -typically less than 5 percent Comments: Some pedons have weak accumulations of secondary carbonates as soft concretions or seams. Some pedons have 0 to 35 percent gravel by volume, below 40 inches. A horizon: Hue: 2.SY, lOYR, 7.SYR, SYR Value: 5 to 6 dry, 3 to 5 moist Chroma: 2 to 6 Consistence: soft to slightly hard Organic cazbon:.5 to 1.5 percent Reaction: slightly to moderately alkaline Structure: granular to crumb, subangulaz blocky allowed Textwe: loamy sand C horizon: Hue: 2.SY, lOYR, 7.SYR, SYR Value: 5 to 7 dry, 4 to 6 moist Chroma: 2 to 4 Calcium carbonate equivalent: less than 1 to 10 percent Reaction: slightly to strongly alkaline Texture: loamy very fine sand stratified with thin layers of sand, sandy loam, loam Comments: There is no distinct continuous horizon of calcium carbonate accumulation.