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SOILS INFORMATION IXHIBIT B Established Series Rev. LAN/DM/AP oa2oal DAVTONE SERIES The Davtone series consists of very deep, well drained soils that formed in alluvium and colluvium derived from red sandstone. Davtone soils are on mountains fans, drainageways, and hills. Slopes range from 2 to 45 percent. Mean annual precipitation is about 24 inches and the mean annual temperature is about 39 degrees F. TAXONOMIC CLASS: Fine-loamy, mixed, superaetive Pachic Argicryolis TYPICAL PEDON: Davtone loam -rangeland. (Colors are for dry soil unless otherwise noted.} A-0 to l9 inches; very dark grayish brown (] OYR 312) loam, very dark brown (lOYR 2/2) moist; strong medium granular swcture; slightly hazd, friable, nonsticky and nonplastic; neutral (pH 6.8); cleaz smooth boundary. (6 to 20 inches thick) AB-19 to 30 inches; reddish brown (SYR 4/3) sandy clay loam, dark reddish brown (SYR 3!3) moist; weak fine subangulaz blocky structure; soft, friable, slightly sticky and slightly plastic; 2 percent cobbles and 10 percent pebbles; neutral (pH 7.0); clear wavy boundary. (0 to 11 inches thick) Btl-30 to 41 inches; reddish brown (SYR 5/3) cobbly sandy clay ]Darn, reddish brown (SYR 413) moist; moderate medium subangulaz blocky structure; hard, friable, slightly sticky and slightly plastic; common faint clay films on faces of pads; 20 percent cobbles and 10 percent pebbles; neutral (pH 7.0); clear wavy boundary. (9 to 14 inches thick) Bt2-41 to 48 inches; reddish brown (SYR 5/3) gravelly sandy clay loam, reddish brown (SYR 4/3) moist; moderate medium subangulaz blocky structure; hazd, friable, sticky and plastic; many faint clay films on faces of pads; 5 percent cobbles and 10 pcrccnt pebbles; neutral (pH 7.2); clear wavy boundary. (7 to 14 inches thick) C--48 to 60 inches; yellowish red (SYR 5/G) very gravelly sandy loam, yellowish red (SYR 416) moist; massive; soft, very friable, nonsticky and nonplas6c; 15 percent cobbles and 35 percent pebbles; neutral (pH 7.2). TYPE LOCATION: Las Animas County, Colorado; about 4.3 miles west of Highway l2 in the south end of Dining Park; T. 33 S., R. 69 W. RANGE IN CHARACTERLSTICS: Soil moisture: The soil moisture control section is affected by precipitation that is relatively evenly distributed throughout the year with peak periods in spring and summer, Udic moisture regime bordering on ustic. Mean annual soil temperature: 39 to 44 degrees F Mean annual summer soil temperature: 55 to 59 degrees F Depth to argillic horizon: 6 to 35 inches Thickness of the mollic epipedon: 1G to 40 inches Thickness of the argillic horizon: 16 to 28 inches