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Custom Soil Resource Report <br />San Joaquin County, California <br />220—Redding gravelly loam, 0 to 8 percent slopes, dry <br />Map Unit Setting <br />National map unit symbol: 2w8bm <br />Elevation: 90 to 750 feet <br />Mean annual precipitation: 12 to 21 inches <br />Mean annual air temperature: 61 to 63 degrees F <br />Frost -free period: 255 to 275 days <br />Farmland classification: Not prime farmland <br />Map Unit Composition <br />Redding, gravelly loam, 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 Redding, Gravelly Loam <br />Setting <br />Landform: Fan remnants <br />Landform position (two-dimensional): Summit <br />Landform position (three-dimensional): Tread <br />Down-slope shape: Linear <br />Across -slope shape: Linear <br />Parent material: Loamy alluvium derived from igneous, metamorphic and <br />sedimentary rock over 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 />Ap - 0 to 5 inches: gravelly loam <br />BA - 5 to 17 inches: gravelly loam <br />2Bt - 17 to 22 inches: clay <br />2Btgm - 22 to 60 inches: cemented gravelly material <br />Properties and qualities <br />Slope: 0 to 8 percent <br />Depth to restrictive feature: More than 80 inches; 20 to 39 inches to duripan <br />Drainage class: Moderately well drained <br />Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr) <br />Depth to water table: About 5 to 39 inches <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Maximum salinity: Nonsaline (0.2 to 0.5 mmhos/cm) <br />Sodium adsorption ratio, maximum: 2.0 <br />Available water supply, 0 to 60 inches: Very low (about 2.0 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 6e <br />Land capability classification (nonirrigated): 6e <br />Hydrologic Soil Group: D <br />Hydric soil rating. No <br />13 <br />