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108 Soil Survey
<br /> Fii
<br /> management considerations include saturated soil buildings increases the hazard of erosion.
<br /> Fconditions in concave areas following rainy periods. The This map unit is in capability units Ille-8 (MLRA-17),characteristic plant community is mainly soft chess, irrigated, and IVe-8 (MLRA-17), nonirrigated. It is in
<br /> ripgut brome, wild oat, and filaree. Grazing should be vegetative soil group G.
<br /> delayed until the soil is firm enough to withstand
<br /> trampling by livestock and the more desirable forage 229—Rocklin fine sandy loam, 0 to 2 percent
<br /> plants have had an opportunity to set seed. slopes. This moderately well drained, nearly level soil is
<br /> Where this unit is used for dryland grain crops, the on dissected terraces that have been leveled. It is
<br /> maim limitation is low rainfall during the growing season. moderately deep to a hardpan. It formed in old alluvium .f
<br /> General management considerations include the hazard derived from granitic rock sources. In most areas slopes
<br /> of erosion. Because the amount of precipitation is not originally were 2 to 5 percent before extensive land
<br /> sufficient for annual cropping, the best suited cropping leveling. Elevation is 80 to 250 feet. The average
<br /> n that includes small rain and summer annual precipitation is about 16 inches, the average
<br /> system is et p p
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<br /> F. Y 9
<br /> fallow. All tillage should be on the contour or across the annual air temperature is about 61 degrees F, and the
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<br /> F} slope. Leaving crop residue on or near the surface average frost-free period is about 275 days.
<br /> helps to conserve moisture, maintain filth, and control Typically, the surface layer and the upper part of the .
<br /> erosion. subsoil are pale brown and light brown fine sandy loam
<br /> This unit is suited to irrigated vineyard crops. The about 25 inches thick. The next 11 inches of the subsoil.
<br /> main limitations are depth to the hardpan and the low is light brown sandy clay loam. The lower part is a light:;
<br /> available water capacity. General management brown, indurated hardpan about 4 inches thick. The r:
<br /> considerations include the hazard of erosion. The underlying material to a depth of 60 inches is reddish
<br /> hardpan limits the suitability for deep-rooted crops. yellow, dense, weakly cemented sandy loam. In some
<br /> I �,( Where feasible, deep ripping of this restrictive layer can areas the surface layer is loam.
<br /> help to overcome this limitation. A tillage pan forms f Included in this unit are small areas of Bruella and
<br /> easily if the soil is tilled when wet. Chiseling or San Joaquin soils on terraces and Hicksville soils in
<br /> subsoiling breaks up the pan. Because the soil is drainageways. Also included, in landscape positions
<br /> droughty, applications of irrigation water should be light similar to those of the dominant Rocklin soil, are
<br /> and frequent. Sprinkler and drip irrigation systems are moderately coarse textured soils that have a hardpan at
<br /> suitable. They permit an even, controlled application of a depth less than 20 inches, small areas of Rocklin
<br /> water, help to prevent excessive runoff, and minimize soils that have slopes of 2 to 5 percent, and moderately.
<br /> the risk of erosion. All tillage should be on the contour coarse textured soils that have a hardpan at a depth of
<br /> or across the slope. If the soil is plowed in fall, runoff more than 40 inches. Included areas make up about 15'
<br /> Fand erosion can be controlled by applying fertilizer and percent of the total acreage.
<br /> seeding a cover crop. Returning crop residue to the soil Permeability is moderate in the Rocklin soil. Available'.
<br /> or regularly adding other organic material improves water capacity is low. The effective rooting depth is
<br /> fertility, minimizes crusting, and maintains the rate of limited by the hardpan at a depth of 20 to 40 inches.
<br /> Fi water intake. Water is briefly perched above the hardpan after
<br /> This unit is suited to irrigated pasture. The main periods of heavy rainfall or irrigation. Runoff is very
<br /> limitation is the low available water capacity. General slow, and the hazard of water erosion is slight. The rate;
<br /> P management considerations include the hazard of of water intake in irrigated areas is 1.5 inches per hour.
<br /> ` erosion. Because the soil is droughty, applications of Most areas of this unit are used for irrigated crops,
<br /> irrigation water should be light and frequent. The water irrigated pasture, or homesite development.
<br /> E can be applied by sprinkler and border methods. This unit is suited to irrigated row, field, and vineyard '
<br /> Seedbed preparation should be on the contour or crops. The main limitations are depth to the hardpan , `
<br /> across the slope where practical. Proper stocking rates, and the low available water capacity. The hardpan limits
<br /> pasture rotation, and restricted grazing during wet the suitability for deep-rooted crops. Where feasible,
<br /> F periods help to keep the pasture in good condition and deep ripping of this restrictive layer can help to
<br /> protect the soil from erosion_ overcome this limitation. Because the soil is droughty, r'.
<br /> If this unit is used for homesite development, the applications of irrigation water should be light and
<br /> main limitation is depth to the hardpan. General frequent. Furrow, sprinkler, and drip irrigation systems-,
<br /> management considerations include the hazard of are suitable. Returning crop residue to the soil or
<br /> erosion. Ripping the hardpan improves permeability and regularly adding other organic material improves fertility]
<br /> thus also improves the suitability of the soil for septic minimizes crusting, and maintains the rate of water
<br /> t + tank absorption fields. Excavation for roads and intake.
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