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San Joaquin County, California <br />180—Jacktone clay, 0 to 2 percent slopes <br />Map Unit Setting <br />National map unit symbol: hhtk <br />Elevation: 0 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: Farmland of statewide importance <br />Map Unit Composition <br />Jacktone and similar soils:85 percent <br />Minor components:15 percent <br />Estimates are based on observations, descriptions, and transects of <br />the mapunit. <br />Description of Jacktone <br />Setting <br />Landform:Basin floors <br />Landform position (two-dimensional):Toeslope <br />Landform position (three-dimensional):Talf <br />Down-slope shape:Linear <br />Across-slope shape:Linear <br />Parent material:Alluvium derived from mixed rock sources <br />Typical profile <br />A - 0 to 22 inches: clay <br />Bk - 22 to 34 inches: clay <br />2Bkqm - 34 to 37 inches: indurated <br />2Bk - 37 to 46 inches: stratified sandy loam to clay loam <br />3Bkq - 46 to 60 inches: cemented <br />Properties and qualities <br />Slope:0 to 2 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):Very low <br />(0.00 in/hr) <br />Depth to water table:About 0 inches <br />Frequency of flooding:Rare <br />Frequency of ponding:None <br />Calcium carbonate, maximum content:10 percent <br />Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 <br />mmhos/cm) <br />Available water capacity:Low (about 5.1 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 3s <br />Map Unit Description: Jacktone clay, 0 to 2 percent slopes---San Joaquin County, California 2482 CARPENTER RD STOCKTON, <br />CALIFORNIA <br />Natural Resources <br />Conservation Service <br />Web Soil Survey <br />National Cooperative Soil Survey <br />3/4/2021 <br />Page 1 of 2