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and Egbert, Guard, and Rioblancho soils in the slightly lower positions Also included are small areas of Stockton soils that are highly calcareous or saline-sodic throughout Included areas make up about 15 percent of the total acreage. Permeability is slow in the Stockton soil. Available water capacity is moderate. The.shrink-swell # ' potential is <high. The effective rooting depth is limited by the hardpan at a depth of 40 to 60 inches. Depth to the water table is more than 5 feet, but water may be briefly perched above the hardpan after periods of heavy rainfall or irrigation. Runoff is slow, and the hazard of water erosion is slight. The rate of water intake in Irrigated areas is 0.1 inch per hour. The soil is subject rare flooding, which occurs during years of abnormally high precipitation. Most areas are used for irrigated crops or orchards. A few areas are used as irrigated pasture or for urban development. This unit may provide wetland functions and values. These should be considered in plans for enhancement of wildlife habitat or land use conversion. rThis unit is suited to irrigated row, field, and orchard crops. The main limitations are the slow permeability and depth to the hardpan. Because of the restricted permeability, water applications Fshould be regulated so that the water does not stand on the surface and damage the crops. The hardpan limits the suitability for deep-rooted crops. Where feasible, deep ripping of this restrictive layer can help to overcome this limitation. The soil should be cultivated only within a narrow range of moisture content. It is too i sticky when wet and too hard when dry. Furrow, border, and sprinkler irrigation Systems are suitable. Returning crop residue to the soil or regularly adding other organic material improves fertility, minimizes crusting, and increases the rate of water intake. This unit is suited to irrigated pasture. Irrigation water ban be applied by sprinkler and border methods. Leveling helps to ensure a uniform application of water. Proper stocking rates, pasture rotation, and restricted grazing during wet periods help to keep the pasture in good condition and protect the soil from compaction. If this unit is used for urban development, the main limitations are the high shrink-swell potential, the slow permeability, depth to the hardpan, and low strength. The ` rare flooding is a hazard. Properly designing foundations and footings and diverting runoff away from buildings help to prevent the structural damage caused by shrinking and swelling. On sites for septic tank absorption fields, the slow permeability can be overcome by increasing the size of the i absorption field, backfilling the trench with sandy material, and installing long absorption lines. Ripping the hardpan improves permeability and thus also improves the suitability of the soil for septic tank absorption fields. Properly designing buildings and roads can offset the limited ability of the soil to support a load. Houses, roads, and streets should be constructed above expected flood levels. This map unit is in capability units IIs-5 (ML-RA-1 7), irrigated, and IVs-5 (MLRA-17), nonirrigated. It is in vegetative soil group C. i { t a