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Soil sur,,-. 128 development. This unit may provide wetland functions Typically, the surface layer .s grayish brown loam, and values. These should be considered in plans for coarse sand about 28 inches thick. The upper 25 Inc, ns f e enhancement of wildlife habitat or land use conversion. coarseusand. The ower part brown, to a depthmottled of7s inches` This unit is suited to irrigated row and field crops. The main limitations are the low available water pale brown, mottled loamy coarse sand. In some are s capacity and depth to the hardpan. General the surface layer is loamy fine sand or sandy loam. Included in this unit are small areas of Delhi and management considerations include the severe hazard Honcut soils on the slightly higher parts of the of soil blowing. Because the soil is droughty, applications of irrigation water should be light and landscape and Manteca and Veritas soils on the slit: i frequent. The high percentage of sand in the soil lower parts. Also included, in landscape positions reduces the amount of moisture available for plant similar to those of the Tinnin soil, are small areas of growth. The hardpan limits the suitability for deep- Timor soils and coarse textured soils that have a rooted crops. Where feasible, deep ripping of this medium textured substratum below a depth of 40 ` restrictive layer can help to overcome this limitation. inches. Included areas make up about 15 percent of e Sprinkler and drip irrigation systems are suitable. They tot lac eagPere.is rapid in the Tinnin soil. Available permit an even, controlled application of water, help to water capacity is low. The effective rooting depth is , ,) prevent excessive runoff, and minimize the risk of erosion. Careful applications of irrigation water are inches or more. Runoff is slow, and the hazard of vof er ated needed to prevent the buildup of a high water table. A erosarea'on s s13.Oslight. n ohes peahour Therhazake in d of so9 blowing tillage pan forms easily if the soil is tilled when wet. s severe. Chiseling or subsoiling breaks up the pan. When the Most areas of this unit are used for irrigated crops, wind velocity is high in spring, the hazard of soil orchards, or vineyards. A few areas are used for blowing can be reduced by properly managing all crop homesite development. residue and by minimizing tillage. This unit is suited to irrigated row, field, orchard, and This unit is suited to irrigated pasture. The main Because vineyard crops. The main limitation is the low available limitation is the low available water capacity. Be applications of irrigation water water capacity. General management considerations the soil is droughty, app 9 should be light and frequent. The water can be applied include the severe hazard of soil blowing. Because t ie by sprinkler and border methods. Leveling helps to soil is droughty, applications o ensure irrigation water should a uniform application of water. Proper stocking be light and frequent. The high percentage of sand in of rates, pasture rotation, and restricted grazing during wet the soil redues the plant growthcSpr'nklerland tdrip nirrigation oisture asystems able ar > periods help to keep the pasture in good condition and suitable. They permit an even, controlled application ,J protect the soil from compaction. water, help to prevent excessive runoff, and minimize If this unit is used for homesite development, the the risk of erosion. A tillage pan forms easily if the soil main limitations are depth to the hardpan and the rapid permeability. The rare flooding is a hazard. Ripping the p tilled when wet. Chiseling or subsoiling breaks up the hardpan improves permeability and thus also improves pan. When the wind velocity is high in spring the the suitability of the soil for septic tank absorption fields. hazard managing oilll blowinrop g due be reduced ducedby imizpg tillage. rly Community sewage systems may s needed because If thisunitis used for homesite development, the seepage from onsite sewage disposal systems can result in the contamination of water supplies. Houses, sewalle saetems mayon is the beneeded belcause se page roads, and streets should be constructed above from onsite sewage disposal systems can result in ti expected flood levels. contamination of water supplies. ` This map unit is in capability units rigatIlls- (MCRAin This map unit is in capability units Ills-4 (MLRA-1-' irrigated, and IVe-4 (MLRA-17), nonirrigated. It is in irrigated, and IVe-4 (MLRA-17), nonirrigated. It is in vegetative soil group B. vegetative soil group B. 255—Tinnin loamy coarse sand, 0 to 2 percentto 2 slopes. This very deep, well drained, nearly level soil is slopes. This avefi a sandy well ai e d nearer level so is on alluvial fans. It formed in alluvium derived from P formed in a granitic rock sources. Elevation is 20 to 70 feet. The oralnit cf an terraces.rock sourcesltA few aresllareudissected by average annual precipitation is about 11 inches, the 9 average annual air temperature is about 60 degrees F, intermittent sloughs that have been filled as a result „f ` and the average frost-free period is about 270 days. land leveling. Elevation is 10 to 125 feet. The avera�,