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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 Setting <br /> Landform: Flood plains on valley floors Landform position (three-dimensional):Talf Down-slope shape: <br /> Linear <br /> Across-slope shape: Linear <br /> Parent material:Alluvium derived from basalt <br /> Typical profile <br /> A -0 to 7 inches:sandy loam Btknz- 7 to 34 inches:clay loam 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 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 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 Land capability classification (nonirrigated):6w Hydrologic <br /> Soil Group: D <br /> Ecological site: R051XY263CO -Salt Flats <br /> Mystic Soil <br /> October 2022 1-6 Lewicki&Associates <br />