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Custom Soil Resource Report <br /> San Joaquin County, California <br /> 118—Capay clay, 0 to 1 percent slopes, MLRA 17 <br /> Map Unit Setting <br /> National map unit symbol: 2xc8q <br /> Elevation: 20 to 350 feet <br /> Mean annual precipitation: 10 to 13 inches <br /> Mean annual air temperature: 61 to 63 degrees F <br /> Frost-free period: 318 to 337 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Capay 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 Capay <br /> Setting <br /> Landform: Basin floors <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 sedimentary rock <br /> Typical profile <br /> Ap-0 to 11 inches: clay <br /> A - 11 to 20 inches: clay <br /> Bss1 -20 to 30 inches: clay <br /> Bss2-30 to 39 inches: clay <br /> Bk1 -39 to 51 inches: clay <br /> Bk2- 51 to 60 inches: clay <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Natural drainage class: Moderately well drained <br /> Runoff class: High <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately low to <br /> moderately high (0.06 to 0.20 in/hr) <br /> Depth to water table: More than 80 inches <br /> Frequency of flooding: None <br /> Frequency of ponding: Frequent <br /> Calcium carbonate, maximum in profile: 1 percent <br /> Gypsum, maximum in profile: 1 percent <br /> Salinity, maximum in profile: Nonsaline to very slightly saline (0.2 to 2.0 <br /> mmhos/cm) <br /> Sodium adsorption ratio, maximum in profile: 3.0 <br /> Available waterstorage in profile: Moderate (about 9.0 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 2s <br /> Land capability classification (nonirrigated): 4s <br /> 13 <br />