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Custom Soil Resource Report <br /> San Joaquin County, California <br /> 173—Hollenbeck silty clay, 0 to 2 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: hhtb <br /> Elevation: 20 to 100 feet <br /> Mean annual precipitation: 14 inches <br /> Mean annual air temperature: 61 degrees F <br /> Frost-free period: 270 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Hollenbeck and similar soils: 85 percent <br /> Minor components: 13 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of Hollenbeck <br /> Setting <br /> Landform: Backswamps on flood plains, swales <br /> Landform position (two-dimensional): Toeslope <br /> Landform position (three-dimensional): Dip <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear, concave <br /> Parent material: Alluvium derived from mixed rock sources <br /> Typical profile <br /> A -0 to 10 inches: silty clay <br /> Bss- 10 to 37 inches: clay <br /> Bk-37 to 42 inches: silty clay loam <br /> Bkqm-42 to 60 inches: cemented <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Depth to restrictive feature: 40 to 60 inches to duripan <br /> Natural drainage class: Moderately well drained <br /> Runoff class: 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: Rare <br /> Frequency of ponding: None <br /> Calcium carbonate, maximum in profile: 5 percent <br /> Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 <br /> mmhos/cm) <br /> Available water storage in profile: Moderate (about 6.5 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 2s <br /> Land capability classification (nonirrigated): 4s <br /> Hydrologic Soil Group: C <br /> Hydric soil rating: No <br /> 13 <br />