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I Official Series Description - OTERO Series <br />Chroma: 2 to 4 <br />Page 2 of 3 <br />Where the value is as dark as 5 dry and 3 moist, the horizon is too thin or contains too little organic matter to be a mollic <br />epipedon. <br />Reaction: neutral to moderately alkaline <br />Texture: typically sandy loam but includes fine and very fine sandy loams, loam, loamy very fine sand, and loamy fine <br />sand <br />C horizon: <br />Hue: 7.SYR to SYR <br />Value: 6 or 7, 4 to 6 moist <br />Chroma: 3 or 4 <br />Calcium carbonate equivalent: 0 to 4 percent <br />Amount and distribution of visible secondary calcium cazbonate is erratic. <br />Texture: fine sandy loam, sandy loam, and loamy very fine sand. <br />COMPETING SERIES: These are the Ashollow, Lindrith, and Pitchdraw series. <br />Ashollow soils formed in residuum from sandstone and do not have visible secondary calcium carbonate in the control <br />section. <br />Lindrith soils are dry in Mav and June. <br />Pitchdraw soils have a pazalithic contact at depths of 51 to 102 centimeters (20 to 40 inches). <br />GEOGRAPHIC SETTING: <br />Landscape: hills, and alluvial plains <br />Landform: fans, blowouts, terraces, hills, ridges, and plains (Surfaces are frequently wind-reworked and have a low dune- <br />like relief) <br />Slopes: 0 to 20 percent. <br />Parent material: alluvia] sediments that have been wind-modified in many places <br />Mean annual precipitation: 33 to 43 centimeters (13 to 17 inches), with peak periods of precipitation during April through <br />August <br />Mean annual air temperature: 9 to 12 degrees C. (48 to 54 degrees F.) <br />Mean summer temperature: 20 to 23 degrees C. (68 to 74 degrees F.) <br />Frost free period: 120 to 165 days. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the Mitchell, Nelson, Olnest, and Vona soils. <br />Mitchell soils aze coarse-silty. <br />Nelson soils have an ustic aridic moisture regime. <br />Olnest and Vona soils have an azgillic horizon. _. <br />DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: <br />Drainage well or somewhat excessively drained <br />Runoff: low to medium <br />Saturated hydraulic conductivity: high <br />USE AND VEGETATION: These soils are used for native rangeland or for dry and irrigated cropland. <br />Native vegetation consists of tall and short grass associations with some yuccas and sand sage. <br />DISTRIBUTION AND EXTENT: Eastern Colorado, western Nebraska, and southeastern Wyoming. LRR G, MLRA 67; <br />The series is of large extent. <br />MLRA OFFICE RESPONSIBLE: Salina, Kansas <br />SERIES ESTABLISHED: Arkansas Valley Area, Colorado, 1926. <br />REMARKS: Diagnostic horizons and features recognized in this pedon are: <br />http://www2.ftw.arcs.usda.gov/osd/dat/O/OTERO.html <br />11/02/2006 <br />