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13—Cascajo gravelly sandy loam, 5 to 20 percent slopes <br />Map Unit Setting <br />National map unit symbol: 361n <br />Elevation: 4,600 to 5,200 feet <br />Mean annual precipitation: 11 to 13 inches <br />Mean annual air temperature: 52 to 54 degrees F <br />Frost-free period: 120 to 160 days <br />Farmland classification: Not prime farmland <br />Map Unit Composition <br />Cascajo and similar soils:85 percent <br />Minor components:15 percent <br />Estimates are based on observations, descriptions, and transects of the mapunit. <br />Description of Cascajo <br />Setting <br />Landform:Terraces, ridges <br />Down-slope shape:Linear <br />Across-slope shape:Linear <br />Parent material:Calcareous gravelly alluvium <br />Typical profile <br />H1 - 0 to 9 inches: gravelly sandy loam <br />H2 - 9 to 31 inches: extremely gravelly sandy loam <br />H3 - 31 to 60 inches: very gravelly sand <br />Properties and qualities <br />Slope:5 to 20 percent <br />Depth to restrictive feature:More than 80 inches <br />Drainage class:Excessively drained <br />Runoff class: Low <br />Capacity of the most limiting layer to transmit water (Ksat):High (2.00 to 6.00 <br />in/hr) <br />Depth to water table:More than 80 inches <br />Frequency of flooding:None <br />Frequency of ponding:None <br />Calcium carbonate, maximum content:25 percent <br />Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) <br />Available water supply, 0 to 60 inches: Low (about 4.1 inches) <br />Interpretive groups <br />Land capability classification (irrigated): None specified <br />Land capability classification (nonirrigated): 7s <br />Hydrologic Soil Group: A <br />Ecological site: R067BY063CO - Gravel Breaks <br />Hydric soil rating: No <br />Custom Soil Resource Report <br />18