SU0004713 SSNL - Laserfiche WebLink

Home Browse Search

6. 00 108 Soil Surrey buildings increases the hazard of erosion. This map unit is ;n capability units Ille-8 (MLRA-17), irrigated, and IVe-8 (MLRA-17), nonirrigated. It is in vegetative soil group G. 229—Rocklin fine sandy loam, 0 to 2 percent slopes. This moderately well drained, nearly level soil i on dissected terraces that have been leveled. It is moderately deep to a hardpan. It formed in old alluviurr derived from granitic rock sources. In most areas slope originally were 2 to 5 percent before extensive land leveling. Elevation is 80 to 250 feet. The average annual precipitation is about 16 inches, the average annual air temperature is about 61 degrees F, and the average frost -free period is about 275 days. Typically, the surface layer and the upper part of the subsoil are pale brown and light brown fine sandy loan about 25 inches thick. The next 11 inches of the subsc is light brown sandy clay loam. The lower part is a ligh brown, indurated hardpan about 4 inches thick. The underlying material to a depth of 60 inches is reddish yellow, dense, weakly cemented sandy loam. In some areas the surface layer is loam. Included in this unit are small areas of Bruella and San Joaquin soils on terraces and Hicksville soils in drainageways. Also included, in landscape positions similar to those of the dominant Rocklin soil, are moderately coarse textured soils that have a hardpan a depth less than 20 inches, small areas of Rocklin soils that have slopes of 2 to 5 percent, and moderate coarse textured soils that have a hardpan at a depth c more than 40 inches. Included areas make up about 1 percent of the total acreage. Permeability is moderate in the Rocklin soil. Availat water capacity is low. The effective rooting depth is limited by the hardpan at a depth of 20 to 40 inches. Water is briefly perched above the hardpan after periods of heavy rainfall or irrigation. Runoff is very slow, and the hazard of water erosion is slight. The ra of water intake in irrigated areas is 1.5 inches per hOL Most areas of this unit are used for irrigated crops, irrigated pasture, or homesite development. This unit is suited to irrigated row, field, and vineya crops. The main limitations are depth to the hardpan and the low available water capacity. The hardpan lin the suitability for deep-rooted crops. Where feasible, deep ripping of this restrictive layer can help to overcome this limitation. Because the soil is droughty applications of irrigation water should be light and frequent. Furrow, sprinkler, and drip irrigation system! are suitable. Returning crop residue to the soil or regularly adding other organic material improves fertil minimizes crusting, and maintains the rate of water intake. management considerations include saturated soil conditions in concave areas following rainy periods. The characteristic plant community is mainly soft chess, ripgut brome, wild oat, and filaree. Grazing should be delayed until the soil is firm enough to withstand trampling by livestock and the more desirable forage plants have had an opportunity to set seed. Where this unit is used for dryland grain crops, the main limitation is low rainfall during the growing season. General management considerations include the hazard of erosion. Because the amount of precipitation is not sufficient for annual cropping, the best suited cropping system is one that includes small grain and summer fallow. All tillage should be on the contour or across the slope. Leaving crop residue on or near the surface helps to conserve moisture, maintain tilth, and control erosion. This unit is suited to irrigated vineyard crops. The main limitations are depth to the hardpan and the low available water capacity. General management considerations include the hazard of erosion. The hardpan limits the suitability for deep-rooted crops. Where feasible, deep ripping of this restrictive layer can help to overcome 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 frequent. Sprinkler and drip irrigation systems are suitable. They permit an even, controlled application of water, help to prevent excessive runoff, and minimize the risk of erosion. All tillage should be on the contour or across the slope. If the soil is plowed in fall, runoff and erosion can be controlled by applying fertilizer and seeding a cover crop. Returning crop residue to the soil or regularly adding other organic material improves fertility, minimizes crusting, and maintains the rate of water intake. 6. This unit is suited to irrigated pasture. The main limitation is the low available water capacity. General management considerations include the hazard of .. erosion. Because the soil is droughty, applications of irrigation water should be light and frequent. The water can be applied by sprinkler and border methods. Seedbed preparation should be on the contour or across the slope where practical. Proper stocking rates, pasture rotation, and restricted grazing during wet periods help to keep the pasture in good condition and protect the soil from erosion. If this unit is used for homesite development, the main limitation is depth to the hardpan. General management considerations include the hazard of erosion. Ripping the hardpan improves permeability and thus also improves the suitability of the soil for septic tank absorption fields. Excavation for roads and Soil Surrey buildings increases the hazard of erosion. This map unit is ;n capability units Ille-8 (MLRA-17), irrigated, and IVe-8 (MLRA-17), nonirrigated. It is in vegetative soil group G. 229—Rocklin fine sandy loam, 0 to 2 percent slopes. This moderately well drained, nearly level soil i on dissected terraces that have been leveled. It is moderately deep to a hardpan. It formed in old alluviurr derived from granitic rock sources. In most areas slope originally were 2 to 5 percent before extensive land leveling. Elevation is 80 to 250 feet. The average annual precipitation is about 16 inches, the average annual air temperature is about 61 degrees F, and the average frost -free period is about 275 days. Typically, the surface layer and the upper part of the subsoil are pale brown and light brown fine sandy loan about 25 inches thick. The next 11 inches of the subsc is light brown sandy clay loam. The lower part is a ligh brown, indurated hardpan about 4 inches thick. The underlying material to a depth of 60 inches is reddish yellow, dense, weakly cemented sandy loam. In some areas the surface layer is loam. Included in this unit are small areas of Bruella and San Joaquin soils on terraces and Hicksville soils in drainageways. Also included, in landscape positions similar to those of the dominant Rocklin soil, are moderately coarse textured soils that have a hardpan a depth less than 20 inches, small areas of Rocklin soils that have slopes of 2 to 5 percent, and moderate coarse textured soils that have a hardpan at a depth c more than 40 inches. Included areas make up about 1 percent of the total acreage. Permeability is moderate in the Rocklin soil. Availat water capacity is low. The effective rooting depth is limited by the hardpan at a depth of 20 to 40 inches. Water is briefly perched above the hardpan after periods of heavy rainfall or irrigation. Runoff is very slow, and the hazard of water erosion is slight. The ra of water intake in irrigated areas is 1.5 inches per hOL Most areas of this unit are used for irrigated crops, irrigated pasture, or homesite development. This unit is suited to irrigated row, field, and vineya crops. The main limitations are depth to the hardpan and the low available water capacity. The hardpan lin the suitability for deep-rooted crops. Where feasible, deep ripping of this restrictive layer can help to overcome this limitation. Because the soil is droughty applications of irrigation water should be light and frequent. Furrow, sprinkler, and drip irrigation system! are suitable. Returning crop residue to the soil or regularly adding other organic material improves fertil minimizes crusting, and maintains the rate of water intake.