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Custom Soil Resource Report <br /> San Joaquin County, California <br /> 237—San Joaquin sandy loam, 2 to 5 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: hhwd <br /> Elevation: 20 to 150 feet <br /> Mean annual precipitation: 16 inches <br /> Mean annual air temperature: 61 degrees F <br /> Frost-free period: 275 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> San Joaquin 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 San Joaquin <br /> Setting <br /> Landform: Fan remnants <br /> Landform position(two-dimensional). Backslope <br /> Landform position(three-dimensional): Side slope <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Alluvium derived from granitic rock sources <br /> Typical profile <br /> Ap-0 to 10 inches: sandy loam <br /> 2Bt- 10 to 20 inches: clay <br /> 2Bgm-20 to 60 inches: indurated <br /> Properties and qualities <br /> Slope: 2 to 5 percent <br /> Depth to restrictive feature: About 10 inches to abrupt textural change; 20 to 40 <br /> inches to duripan <br /> Natural drainage class: Moderately well drained <br /> Runoff class: Very high <br /> Capacity of the most limiting layer to transmit water(Ksat): Very low(0.00 in/hr) <br /> Depth to water table. More than 80 inches <br /> Frequency of flooding: None <br /> Frequency of ponding: None <br /> Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 <br /> mmhos/cm) <br /> Available water storage in profile: Very low(about 1.2 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 4e <br /> Land capability classification(nonirrigated): 4e <br /> Hydrologic Soil Group: D <br /> Ecological site: LOAMY CLAYPAN (R017XE104CA) <br /> Hydric soil rating: No <br /> 10 <br />