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because it is cloddy when dry and sticky and plastic when wet. The native grasses are mainly galleta, <br />blue grama, and alkali sacaton. The land capability classifications are 3S (irrigated) and 6s (non- <br />irrigated). This component is in the R069XY033C0 Salt Flats ecological site description. <br />Map Unit: OtA — Otero clay loam <br />The Otero clay loam component makes up 90 percent of the map unit. It occurs in the elevation range <br />of 4,400 feet to 5,200 feet. The frost -free period is 145 to 175 days. Slopes are 0 to 1 percent. This <br />component formed on high terraces along the Arkansas River from wind sorted eolian and/or sandy <br />alluvium. A typical soil profile is 0 to 12 inches clay loam and 12 to 60 inches sandy loam. Runoff is <br />slow and the erosion hazard is slight in irrigated areas and high in non - irrigated areas. Depth to a root <br />restrictive layer is greater than 80 inches. The natural drainage class is well drained. The capacity of <br />the most limiting layer to transmit water is moderately high (0.20 to 0.60 in/hr.) The depth to seasonal <br />high water table is more than 80 inches. The frequency of flooding is none and the frequency of <br />ponding is none. The permeability is rapid and the available water capacity is moderate (about 8.5 <br />inches). The sodium adsorption ration is not available in the data set. The maximum content of <br />calcium carbonate is 10 per cent. The surface soils are mildly alkaline and remaining soils are <br />moderately alkaline. Soil pH ranges from to 8.4. It has a low shrink -swell potential. The soil is non - <br />saline (0.0 to 2.0 mmhos /cm). The native grasses are mainly blue grama, and sand dropseed. The land <br />capability classifications are 1 (irrigated) and 6e (non - irrigated). This component is in the <br />R069XY006CO Loamy ecological site description. <br />Map Unit: Bm — Bloom silt loam <br />The Bloom silt loam component makes up 85 percent of the map unit. It occurs in the elevation range <br />of 4,300 feet to 4,800 feet. The frost -free period is 155 to 165 days. Slopes are 0 to 2 percent. This <br />component formed on flood plains in loamy alluvium. A typical soil profile is 0 to 8 inches silty loam, <br />8 to 14 inches silty clay loam, 14 to 35 inches silty clay loam, and 35 to 60 inches silty clay loam with <br />thin seams of loamy very fine sand. Runoff is slow and the erosion hazard is moderate. Depth to a root <br />restrictive layer is greater than 80 inches. The natural drainage class is somewhat poorly drained. The <br />capacity of the most limiting layer to transmit water is moderately high (0.20 to 0.60 in/hr.) The depth <br />to seasonal high water table is 1.5 to three feet. The frequency of flooding is occasional and the <br />frequency of ponding is none. The permeability is moderate and the available water capacity is high. <br />The sodium adsorption ration is maximum, 10.0. The maximum content of calcium carbonate is 10 per <br />cent. The soil is moderately alkaline. Soil pH is 7.9 to 8.4. The soil is non - saline (0.0 to 16.0 <br />mmhos /cm). The native grasses are mainly alkali sacaton and inland saltgrass. Willow and tamarisk <br />grow in places. The land capability classifications are Illw -1 (irrigated) and VIw -1 (non - irrigated). <br />This component is in the R069XY03000, Salt Meadow ecological site description. <br />