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DRA- Bruella sandy loam, 0 to 2 percent slopes. This very deep, well drained soil is on nearly level low terraces. It formed in alluvium from granitic rock sources. A few areas are dissected by intermittent sloughs that have been filled because of land-leveling. Elevation is TO to 120 feet. The average annual precipitation is about 15 inches, the average annual air temperature is about 60 degrees F, and the average frost-free period is about 270 days. Typically, the upper 11 inches of the surface layer is brown sandy loam. The lower 7 inches is brown sandy loan. The upper 13 inches of the subsoil is brown sandy clay loan. The lower 36 inches is brown sandy clay loam. In some areas the surface layer is loam. Included in this unit are small areas of San Joaquin, Tokay and Kingdon soils on slightly lower positions. Also included are small areas of Kimball and Devries soils on slightly lower positions. Included areas make up about 15 percent of the total acreage. Permeability of this Bruella soil is moderately slow. Available water capacity is high. Effective rooting depth is 60 inches or more. Runoff is slow and the hazard of water erosion is slight. The water intake family for irrigation is 1.5. Most areas of this unit are used for irrigated cropland, orchards and vineyards. A few areas are used for homesite development. This unit is well suited to irrigated row, field, orchard and vine crops. It has few limitations. Furrow, border, corrugation and sprinkler irrigation systems are suited to this soil . Returning crop residue to the soil or regularly adding other organic matter improves fertility, reduces crusting and maintains the water intake rate. If this unit is used for homesite development, the main limitation is moderately slow permeability. If the soil is used for septic tank absorption fields, the limitation of moderately slow permeability can be overcome by increasing the size of the absorption field. The map unit is in capability units I (MLRA-17), irrigated and IVc-1 (MLRA-17), nonirrigated. This map unit is vegetative soil group A. SAN JOAQUIN COUNTY SOIL SURVEY PRELIMINARY DRAFT 7/90 SUBJECT TO CHANGE