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Site Type: Rangeland Sandy MLRA: 69 -Upper Arkansas Valley Rolling Plains R069XY026CO Representative Soil Features The soils of this site are very deep but also include moderately deep and deep soils. Typically, they are somewhat excessively drained to well drained and have moderately rapid, moderate or moderately slow permeability. Typically, these sails formed in alluvium and eolian deposits derived from mixed sources. They occur on plains, fans, and terraces. The available water capacity is typically high for the deep and very deep soils and low to moderate for the moderately deep soils. The soil surface layer ranges from 3 to 16 inches thick and is typically sandy loam or very fine sandy loam. The subsoil is typically sandy clay loam, but includes sandy loam or clay loam. The pH ranges from neutral to moderately alkaline in the surface and subsoil, and slightly alkaline to strongly alkaline in the substratum. The soil moisture regime is typically ustic aridic, but ranges to aridic in the driest areas of MLRA 69. The soil temperature regime is mesic. The Historic Climax Plant Community (HCPC) should portray slight to no evidence of rills. Water flow paths, if present, are broken, irregular in appearance or discontinuous with numerous debris dams or vegetative barriers. Wind scoured areas and pedestaled plants may exist in areas but should be minor. The soil surface is stable and intact. Sub-surface soil layers are non-restrictive to water movement and root penetration. Major soil series correlated to this ecological site include: Ascalon, Ascalon dry, Bresser, Fort, Fort Collins, Nelson, Olney, Otero, Oterodry, Satanta, Stoneham, Sundance, Truckton dry, Vona, and Vonid. Soils that will be correlated to other MLRA's when outdated soil surveys are updated are: Ascalon, Bresser, Fort Collins, Otero, and Vona. These soils have and aridic ustic moisture regime. Other soil series that have been correlated to this site include: none Parent Material Kind: eolian deposits and alluvium Parent Material Origin: mixed sedimentary Surface Texture: sandy loam, fine sandy Icam, loamy sand, loamy fine sand Surface Texture Modifier: none, but includes gravelly Subsurface Texture Group: sandy loam, fine sandy loam, sandy clay loam, clay loam Surface Fragments < 3" (% Cover): 0 to 35 percent Surface Fragments > 3" (%Cover): 0 to 15 percent Subsurface Fragments < 3" (% Volume): 0 to 35 percent above 40 inches Subsurface Fragments > 3" (% Volume): 0 to 35 percent above 40 inches Rock fragments generally average less than 15 percent, but ranges to 35 percent below a depth of 20 inches. Minimum Drainage Class: Permeability Class: Depth (inches): Electrical Conductivity (mmhos/cm)*: Sodium Absorption Ratio*: Soil Reaction (1:1 Water)*: Soil Reaction (0.1M CaCl2)*: Available Water Capacity (inches)*: Calcium Carbonate Equivalent (percent)*: somewhat excessively moderately rapid 20 0 0 6.8 6.4 2.0 0 *These attributes represent 0-40 inches in depth or to the first restrictive layer. Maximum well moderately slow 60 3 5 8.4 8.2 7.0 35 Technical Guide USDA NRCS Section IIE 3 Rev. 3/04