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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 t a sticky when wet and too hard when dry. Furrow,row, border, and sprinkler irrigation Systems are suitable. Returning crop residue to the sail or regularly adding other organic material improves fertility, minimizes crusting, and increases the rate of water intake. r This unit is suited to irrigated.pasture. Irrigation water 6an 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. t ` 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 TA sites for septic tank absorption fields, the slow permeability can be overcome by increasing the size of the 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 lis-5 (MLRA-17), irrigated, and IVs-5 (MLRA-17), nonirrigated. It is in vegetative soil group C. Physical and Chemical Properties of the Site"Soils Soil suitabilities and limitations for agricultural waste application'are based on the following severely rated soil property or properties (NRCS —Agricultural Waste Management Field Handbook): t Available water ca acit Available Water capacity is a measure of the soil's capacity to hold water in a form available to # plants. It is a function of soil porosity, texture, structure, organic matter content, and salinity. Considering a crop with a 60-inch effective root, the values of inches of water per inch of soil were obtained from the soil survey tables. ` The results of the calculations for the site soils are presented below: Available Water -within 60" Jacktone clay 8.41" Madera sandy loam 6.39" Manteca fine sandy loam Stockton clay 9.0.4" Refer to page 22 for Endnotes and Reference Sources ®Western Dairy Design Associates,Inc.2003 ; [ ' Page 9 I E JL__ I