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Custom Soil Resource Report <br /> 63—San Luis sandy loam, 0 to 1 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: 2wljj <br /> Elevation: 7,600 to 8,000 feet <br /> Mean annual precipitation: 6 to 8 inches <br /> Mean annual air temperature: 39 to 43 degrees F <br /> Frost-free period. 90 to 100 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> San luis and similar soils: 100 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of San Luis <br /> Setting <br /> Landform: Flood plains on valley floors <br /> Landform position (three-dimensional):Talf <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material:Alluvium derived from basalt <br /> Typical profile <br /> A -0 to 7 inches: sandy loam <br /> Btknz- 7 to 34 inches: clay loam <br /> 2Cg-34 to 60 inches: sand <br /> Properties and qualities <br /> Slope:0 to 1 percent <br /> Depth to restrictive feature:25 to 39 inches to strongly contrasting textural <br /> stratification <br /> Drainage class: Somewhat poorly drained <br /> Runoff class: Low <br /> Capacity of the most limiting layer to transmit water(Ksat):Very low to moderately <br /> low(0.00 to 0.07 in/hr) <br /> Depth to water table:About 24 to 42 inches <br /> Frequency of flooding: None <br /> Frequency of ponding: None <br /> Calcium carbonate, maximum content: 15 percent <br /> Gypsum, maximum content. 3 percent <br /> Maximum salinity:Slightly saline to strongly saline(4.0 to 16.0 mmhos/cm) <br /> Sodium adsorption ratio, maximum:60.0 <br /> Available water capacity. Low(about 4.5 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 3w <br /> Land capability classification (nonirrigated): 6w <br /> Hydrologic Soil Group: D <br /> Ecological site: R051 XY263CO-Salt Flats <br /> Hydric soil rating: No <br /> 16 <br />