SU0004350 SSNL - Laserfiche WebLink

Home Browse Search

This unit is suited to irrigated pasture. The main limitations are the complex slopes and the low r available water capacity. Leveling helps to ensure a uniform application of water. Because.the soil is droughty, applications of irrigation water should be light and frequent. The water can be applied by sprinkler and border methods. 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. � This unit is suited to irrigated row, field, and vineyard crops. The main limitations are the complex Ik.. slopes, depth to the very slowly permeable claypan and hardpan, and the low available water capacity. Leveling helps to ensure a uniform application of water. The hardpan limits the suitability for deep-rooted crops. Where feasible, deep ripping of this restrictive layer can help to overcome r this limitation. A tillage pan forms easily if the soil is tilled when wet. Chiseling or subsoiling breaks up the pan. Because the soil is droughty, applications of irrigation water should be light and F] frequent. 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 maintains the rate of water intake. rIf this unit is used for homesite development, the main limitations are depth to the very slow) P p ry Y permeable claypan and hardpan, the high shrink-swell potential, and low strength in the clayey subsoil. On sites for septic tank absorption fields, the very slow permeability can be overcome by F1 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 I l suitability of the soil for septic tank absorption fields. Excavation for building sites is limited',by the hardpan. Properly designing foundations and footings and diverting runoff away from buildings help to prevent the structural damage caused by shrinking and swelling. Properly designing buildings and roads can offset the limited ability of the soil to support a load. This map unit is in capability unit IVs-3 (MLRA-17), irrigated and nonirrigated. It is in vegetative soil F. group D. 196-Manteca fine sandy loam, 0 to 2 percent slopes. F� This moderate) well drained near) level soil is on low tern y y aces. It is moderately deep to a hardpan. It formed in alluvium derived from mixed rock sources. Elevation is 20 to 110 feet. The Faverage annual precipitation is about 11 inches, the average annual air temperature is about 60 degrees F, and the average frost-free period is about 270 days. Typically, the surface layer is grayish brown fin sandy loam about 11 inches thick. The upper part of the subsoil is grayish brown and light brownish gray fine sandy loam about 13 inches thick. The next part is a light gray, indurated hardpan, which extends to a depth of 35 inches. The lower park is a light gray, weakly cemented to strongly cemented hardpan, which extends to a depth of 54 inches. The underlying material to a depth of 74 inches is variegated light gray and white sandy loam. In some areas the surface layer is loam or clay loam. F Included in this unit are small areas of Tinnin and Veritas soils on the slightly higher parks of the landscape, small areas of Guard and Trahern soils on the slightly lower parts, and a few areas F where depth to the hardpan is as little as 10 inches, mainly where deep leveling cuts have been made. Also included are some areas of soils that have been subsoiled or deeply ripped and have fragments of cemented material-on the surface and throughout the profile. Included areas make up about 15 percent of the total acreage. `a I ,