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Custom Soil Resource Report <br />San Joaquin County, California <br />149—Devries sandy loam, drained, 0 to 2 percent slopes, MLRA 16 <br />Map Unit Setting <br />National map unit symbol: 2x4I2 <br />Elevation: 0 to 90 feet <br />Mean annual precipitation: 18 to 18 inches <br />Mean annual air temperature: 61 to 62 degrees F <br />Frost-free period: 343 to 345 days <br />Farmland classification: Not prime farmland <br />Map Unit Composition <br />Devries 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 Devries <br />Setting <br />Landform: Rims on basin floors <br />Landform position (three-dimensional): Tread, talf <br />Down-slope shape: Linear <br />Across-slope shape: Linear <br />Parent material: Coarse-loamy alluvium derived from igneous, metamorphic and <br />sedimentary rock <br />Typical profile <br />Ap - 0 to 4 inches: sandy loam <br />A - 4 to 15 inches: sandy loam <br />AB - 15 to 21 inches: sandy loam <br />Bt - 21 to 27 inches: sandy loam <br />Bkqm - 27 to 47 inches: cemented sandy loam <br />C - 47 to 62 inches: sandy loam <br />Properties and qualities <br />Slope: 0 to 2 percent <br />Depth to restrictive feature: 20 to 40 inches to duripan <br />Natural drainage class: Somewhat poorly drained <br />Runoff class: Very low <br />Capacity of the most limiting layer to transmit water (Ksat): Very low to moderately <br />low (0.00 to 0.14 in/hr) <br />Depth to water table: About 60 inches <br />Frequency of flooding: Rare <br />Frequency of ponding: None <br />Calcium carbonate, maximum in profile: 4 percent <br />Salinity, maximum in profile: Nonsaline (0.1 to 0.7 mmhos/cm) <br />Sodium adsorption ratio, maximum in profile: 10.0 <br />Available water storage in profile: Low (about 3.5 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 3w <br />Land capability classification (nonirrigated): 4w <br />Hydrologic Soil Group: C <br />Hydric soil rating: Yes <br />13