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Map Unft(Description. Hollenbeck silly clay.0 to 2 percent slopes—San Joaquin County. <br /> California <br /> San Joaquin County, California <br /> 173—Hollenbeck silty clay, 0 to 2 percent slopes <br /> Map Unit Setting <br /> National reap unit symbol: hhtb <br /> Elevation: 20 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: Prime farmland if irrigated <br /> Map Unit Composition <br /> Hollenbeck and similar soi)s: 85 percent <br /> Minor components: 15 percent <br /> Estimates are based on observations, descriptions, and transects of <br /> the mapunit_ <br /> Description of Hollenbeck <br /> Setting <br /> Landform-- Backswamps on flood plains, swales <br /> Landforrn position (two-dimensional): Toeslope <br /> Landforrn position (three-dimensional): Dip <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear, concave <br /> Parent material: Alluvium derived from mixed rock sources <br /> Typical profile <br /> A - 0 to 10 inches: silty clay <br /> Bss- 10 to 37 inches: clay <br /> Bk- 37 to 42 inches: silty clay loam <br /> Bkgm - 42 to 60 inches: cemented <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Depth to restrictive feature: 40 to 50 inches to duripan <br /> Natural drainage class: Moderately well drained <br /> Runoff class: High <br /> Capacity of the most limiting layer to transmit water(Kset]: Very <br /> low(0.00 inihr) <br /> Depth to water table: More than 80 inches <br /> Frequency of flooding: Rare <br /> Frequency ofponding: None <br /> Calcium carbonate, maximum in profile: 5 percent <br /> Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 <br /> to 2.0 mmhoslcm) <br /> Available water storage in profile: Moderate (about 6.5 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 2s <br /> Land capability classification (nonirrigatedj: 4s <br /> t DIY% Natural Resources Web Soil Survey 912712019 <br /> 1111 Conservation Service National Cooperative Soil Survey Page 1 of 2 <br />