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Custom Soil Resource Report <br />San Joaquin County, California <br />160 --Galt clay, 0 to 1 percent slopes, MLRA 17 <br />Map Unit Setting <br />National map unit symbol: 2w8cj <br />Elevation: 10 to 140 feet <br />Mean annual precipitation: 12 to 21 inches <br />Mean annual air temperature: 61 to 63 degrees F <br />Frost -free period: 250 to 300 days <br />Farmland classification: Farmland of statewide importance <br />Map Unit Composition <br />Galt 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 Galt <br />Setting <br />Landform: Basin floors on fan remnants <br />Landform position (two-dimensional): Toeslope <br />Landform position (three-dimensional): Tread <br />Down-slope shape: Linear <br />Across -slope shape: Linear <br />Parent material: Clayey alluvium derived from igneous, metamorphic and <br />sedimentary rock over cemented alluvium derived from igneous, metamorphic <br />and sedimentary rock <br />Typical profile <br />A - 0 to 5 inches: clay <br />Bss1 - 5 to 13 inches: clay <br />Bss2 - 13 to 22 inches: clay <br />Bss3 - 22 to 32 inches: clay <br />2Bkgm - 32 to 60 inches: cemented material <br />Properties and qualities <br />Slope: 0 to 1 percent <br />Depth to restrictive feature: 20 to 40 inches to duripan <br />Drainage class: Somewhat poorly drained <br />Runoff class: High <br />Capacity of the most limiting layer to transmit water (Ksat): Moderately low (0.01 to <br />0.14 in/hr) <br />Depth to water table: About 5 to 32 inches <br />Frequency of flooding: Rare <br />Frequency of ponding: Frequent <br />Calcium carbonate, maximum content: 2 percent <br />Maximum salinity: Nonsaline (0.2 to 0.5 mmhos/cm) <br />Sodium adsorption ratio, maximum: 1.0 <br />Available water supply, 0 to 60 inches: Low (about 4.8 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 3s <br />Land capability classification (nonirrigated): 3s <br />Hydrologic Soil Group: D <br />13 <br />