2008-03-03_PERMIT FILE - C2006085 (13)

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Ui~icial 5enes llescnption - U'1'r:KU Jenes LOCATION OTERO Established Series Rev. LAN/GB/JWB 05/2005 CO+KS NE NM OK WY OTERO SERIES rage i or s The Otero series consists of very deep, well or somewhat excessively drained soils that formed in alluvium and eolian material. Otero soils are on hills, plains, blowouts, ridges, stream terraces, and fans. Slopes are 0 to 20 percent. The mean annual precipitation is 14 inches and the mean annual temperature is 51 degrees F. TAXON01~9.IC CLASS: Coarse-loamy, mixed, superactive, calcareous, mesic Aridic LTstorthents TYPICAL PEDON: Otero sandy loam -grassland. (Colors are for dry soil unless otherwise noted.) A--O to 6 inches; grayish brown (lOYR 5/2) sandy loam, dark grayish brown (lOYR 4/2) moist; weak very fine granular structure; soft, very friable; strongly effervescent; moderately alkaline (pH 8.0); clear smooth boundary. (3 to 8 inches thick) AC--6 to 14 inches; light brownish gray (lOYR 6/2) sandy loam, dark grayish brown (lOYR 4/2) moist; very weak medium subangular blocky structure parting to weak coarse granular; soft, very friable; strongly effervescent; moderately alkaline (pH 8.0); gradual smooth boundary. (0 to 9 inches thick) C--14 to 60 inches; very pale brown (lOYR 7/3) sandy loam, brown (lOYR 5/3) moist; massive; slightly hard, very friable; secondary calcium carbonate occumng discontinuously and at variable depths in the form of soft masses, and in thin seams and streaks; violently effervescent; moderately alkaline (pH 8.2). TYPE LOCATION: Baca County, Colorado; approximately 1,848 feet west and 200 feet north of the southeast corner of Sec. 6, T. 31 S., R. 50 W. RANGE IN CHARACTERISTICS: Soil moisture: moist in some part of the moisture control section for about 40 to 90 cumulative days while the soil temperature is 41 degrees or higher; moist intermittently April though August; ustic moisture regime bordering on aridic. Mean annual soil temperature: 47 to 58 degrees F. Mean summer soil temperature: 59 to 79 degrees F. Depth to secondary calcium carbonate: at the surface, but are noncalcareous for 1 to 10 inches in some pedons. The weighted average organic carbon content of the surface 15 inches is 0 to 1 percent, and the organic carbon decreases uniformly with increasing depth. Sand/clay ratios range from 3 to 15. Particle size control section: Clay content: 5 to 18 percent Silt content: 5 to 35 percent Sand content: 50 to 82 percent, with 15 to 35 percent being fine or coarser sand Rock fragment content: typically less than 2 percent, but ranges from 0 to I S percent. http://ortho.ftw.nres.usda.gov/cgi-bin/osd/osdname.cgi?-P 1/27/2006