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Map Unit Description: Guard clay loam, drained, 0 to 2 percent slopes ---San Joaquin County, <br />California <br />San Joaquin County, California <br />169—Guard clay loam, drained, 0 to 2 percent slopes <br />Map Unit Setting <br />National map unit symbol: hht6 <br />Elevation: -10 to 30 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 />Guard 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 Guard <br />Setting <br />Landform: Rims on 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 15 inches: clay loam <br />Bkq - 15 to 72 inches: clay loam <br />Properties and qualities <br />Slope: 0 to 2 percent <br />Depth to restrictive feature: More than 80 inches <br />Drainage class: Poorly drained <br />Runoff class: High <br />Capacity of the most limiting layer to transmit water <br />(Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) <br />Depth to water table: About 60 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: Moderate (about 8.5 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 2w <br />Land capability classification (nonirrigated): 4w <br />Hydrologic Soil Group: C <br />Hydric soil rating: Yes <br />Lsi),\ Natural Resources Web Soil Survey 4/22/2021 <br />Conservation Service National Cooperative Soil Survey Page 1 of 2 <br />