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Official Series Description - Series • Page 1 of 2 <br /> LOCATION BANKARD CO+KS MT NE NM SD UT WY <br /> ' Established Series <br /> Rev. AJC/GB/JB <br /> 10/96 <br /> BANKARD SERIES <br /> 1 The Bankard series consists of very deep, well to somewhat excessively drained soils that formed in <br /> alluvium from a variety of rocks. Bankard soils are on flood plains and low terraces and have slopes <br /> ' of 0 to 6 percent. The mean annual precipitation is about 14 to 17 inches and the mean annual <br /> temperature is about 48 degrees F. <br /> TAXONOMIC CLASS: Sandy, mixed, mesic Ustic Torrifluvents <br /> TYPICAL PEDON: Bankard loamy sand-grassland. (Colors are for dry soil unless otherwise <br /> noted.) <br /> A- 0 to 5 inches; light brownish gray(2.5Y 6/2) loamy sand, grayish brown(2.5Y 5/2)moist; weak <br /> fine granular structure; soft, very friable; slightly effervescent; moderately alkaline(pH. 8.0);clear <br /> smooth boundary. (4 to 8 inches thick) <br /> C--5 to 60 inches; light yellowish brown(2.5Y 6/3) loamy very fine sand stratified with thin layers <br /> of sand, sandy loam, and loam, light olive brown(2.5Y 513) moist; the weighted average texture is <br /> loamy fine sand; single grain; soft, very friable, strongly effervescent; moderately alkaline(pH 8.2). <br /> ' TYPE LOCATION: Morgan County,Colorado; 100 feet south and 210 feet east of the northwest <br /> comer of Sec. 30, T. 4 N., R. 56 W. <br /> ' RANGE IN CHARACTERISTICS: Mean annual soil temperature ranges from 47 to 53 degrees F., <br /> and mean summer soil temperature ranges from 60 to 78 degrees F. The soils are typically <br /> ' calcareous throughout but are noncalcareous in the upper few inches in some pedons. Organic <br /> carbon in the A horizon ranges from .5 to 1.5 percent and decreases irregularly with increasing <br /> depth. The particle-size control section is variable in texture due to the stratification, but loamy fine <br /> ' sand predominates above 40 inches. Rock fragments range from 0 to 25 percent,but are typically <br /> less than 5 percent. Weak accumulations of secondary carbonate as soft concretions or seams is <br /> present in some pedons. In some pedons, gravel ranges from 0 to 35 percent below depths of 40 <br /> inches. The moisture control section is moist in some or all parts for as long as 60 consecutive days <br /> when the soil temperature at 20 inches is 41 degrees F., which occurs in April. <br /> ' The A horizon has hue of 2.5Y through 5YR, value of 5 or 6 dry, 3 through 5 moist, and chroma of 2 <br /> through 6. Typically the horizon has granular or crumb structure but is subangular blocky in some <br /> pedons. It is soft or slightly hard and is slightly alkaline or moderately alkaline. <br /> ' The C horizon has hue of 2.5Y through 5YR value 5 to 7 dry, 4 to 6 moist, and chroma of 2 to 4. It is <br /> slightly alkaline to strongly alkaline. Calcium carbonate equivalent ranges from less than 1 to 10 <br /> percent depending upon character of individual strata, but there is no distinct continuous horizon of <br /> calcium carbonate accumulation. <br />