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Custom Soil Resource Report <br /> San Joaquin County, California <br /> 128—Cogna loam, 0 to 2 percent slopes, overwash <br /> Map Unit Setting <br /> National map unit symbol. 2x8lf <br /> Elevation: 100 to 210 feet <br /> Mean annual precipitation: 18 to 19 inches <br /> Mean annual air temperature: 63 degrees F <br /> Frost-free period: 325 to 350 days <br /> Farmland classification. Prime farmland if irrigated <br /> Map Unit Composition <br /> Cogna 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 Cogna <br /> Setting <br /> Landform:Alluvial fans, terraces <br /> Landform position (three-dimensional): Tread <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Mixed alluvium <br /> Typical profile <br /> A -0 to 25 inches: loam <br /> Bk- 25 to 38 inches: clay loam <br /> C-38 to 64 inches: loam <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Depth to restrictive feature. More than 80 inches <br /> Drainage class: Well drained <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high <br /> (0.57 to 1.98 in/hr) <br /> Depth to water table: More than 80 inches <br /> Frequency of flooding: Rare <br /> Frequency of ponding: None <br /> Calcium carbonate, maximum content. 2 percent <br /> Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) <br /> Available water supply, 0 to 60 inches: High (about 9.3 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated). 1 <br /> Land capability classification (nonirrigated): 3c <br /> Hydrologic Soil Group: B <br /> Ecological site: R017XY905CA- Dry Alluvial Fans and Terraces <br /> Hydric soil rating. No <br /> Minor Components <br /> Archerdale, clay loam <br /> Percent of map unit: 6 percent <br /> Landform: Stream terraces <br /> 13 <br />