Laserfiche WebLink
Custom Soil Resource Report <br /> 242—San Joaquin-Urban land complex, 0 to 2 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: hhwk <br /> Elevation: 20 to 110 feet <br /> Mean annual precipitation: 16 inches <br /> Mean annual air temperature: 61 degrees F <br /> Frost-free period: 275 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> San Joaquin and similar soils: 50 percent <br /> Urban land: 35 percent <br /> Minor components: 15 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of San Joaquin <br /> Setting <br /> Landform: Terraces <br /> Landform position(two-dimensional). Shoulder <br /> Landform position(three-dimensional): Tread <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Alluvium derived from granitic rock sources <br /> Typical profile <br /> Ap-0 to 16 inches: loam <br /> 2Bt- 16 to 26 inches: clay <br /> 2Bgm-26 to 60 inches: indurated <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Depth to restrictive feature: About 16 inches to abrupt textural change; 20 to 40 <br /> inches to duripan <br /> Natural drainage class: Moderately well drained <br /> Runoff class: Very high <br /> Capacity of the most limiting layer to transmit water(Ksat): Very low(0.00 in/hr) <br /> Depth to water table: More than 80 inches <br /> Frequency of flooding: None <br /> Frequency of ponding: None <br /> Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 <br /> mmhos/cm) <br /> Available water storage in profile: Very low(about 2.4 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 3s <br /> Land capability classification (nonirrigated): 4s <br /> Hydrologic Soil Group: D <br /> 18 <br />