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Soil Surveys Jdaquin County, .California irrigated, and IVs-3 (MLRA-17), nonirrigated. It is in T. erosion, and the very low available water t vegetative soil group D. city. The characteristic plant community is mainly y 'chess, ripguf brome, fox#ail fescue, and filaree. s 220—Redding gravelly loam, 2 to 8 percent slopes;, r' �should be delayed until the soil is firm enough b This moderately well drained, undulating and gently ., r9,th5tand trampling by livestock and the more ' rolling sail is on high terraces. 1# is moderatelydeep p to able forage plants have had an opportunity to set F a hardpan. It formed in alluvium derived from mixed ;J razing should be controlled so that desirable rock sources. The native vegetation is mainly annual Station, such as soft chess, is maintained and c grasses and forbs. Slopes are complex, and the ugia vegetation is left standing to protect the soil F F. landscape is characterized by hummocky microrelief. om erosion: The very low available water capacity Elevation is 130 to 300 feet. The average annual I its the production of desirable forage plants. Filprecipitation is about 17 inches, the average annual air. Th unit is suited to irrigated pasture. The main temperature is about 60 degrees F, and the average i .iti�tion is the very low available water capacity. c frost-free period is about 270 days. nes .1 management considerations include the hazard r Typically, the upper part of the surface layer is strong pf erosion. Because the soil is droughty, applications of brown gravelly loam about 7 inches thick. The lower lrrigatign water should be light and frequent. The water , part is reddish yellow gravelly loam about 9 inches pari pe applied by sprinkler and border methods. I thick. The upper part of the subsoil is a claypan of Seedbed preparation should be on the contour or 1 reddish brown clay about 6 inches thick. The lower part a 'ross.,the slope where practical. Proper stocking rates, + to a depth of 60 inches is a reddish yellow and pasture rotation, and restricted grazing during wet yellowish red, indurated hardpan. In some areas the eriods help to keep the pasture in good condition and i the soil from erosion. 1 surface layer is gravelly sandy loam, cobbly loam, or protect loam. iN.here this unit is used for dryland grain crops, the I Included in this unit are small areas of Bellota and mg1n#imitation is low rainfall during the growing season. j Pardee soils on terraces and shallow, medium textured'' general management considerations include the hazard. soils that have a claypan at a depth of 10 to 15 inches of erosion. Because the amount of precipitation is not and are in landscape positions similar to the Reddingsufficient for annual cropping, the best suited cropping soil. Also included are small areas of Alamo and system is one that includes small grain and summer Yellowiark soils in drainageways, Pentz soils on the (alio All tillage should be on the contour or across the F slightly higher terraces, Peters soils in the slightly lower. slop Limiting tillage during seedbed preparation and landscape positions, and Redding soils that have slopes using the application of weed-control measures helps + of 8 to 30 percent and are on the slightly higher parts oftt? control runoff and erosion. Leaving crop residue on the landscape. Included areas make up about 15 or near the surface helps to conserve moisture, percent of the total acreage. a_intain tilth, and control erosion. Permeability is very slow in the Redding soil. This map unit is in capability unit 1Ve-3 (MLRA-17), Available water capacity is very low. The shrink-swell irrigated and nonirrigated. It is in vegetative soil group Is potential is high. The effective rooting depth is limited by the hardpan at a depth of 20 to 40 inches. Roots are restricted to cracks and the faces of peds in the 221—Redding gravelly loam, 8 to 30 percent claypan, which is at a depth of 16 to 22 inches. Water SIDp-S. This moderately well drained, rolling to is briefly perched above the claypan after periods of ritotlerately steep soil is on dissected high terraces. It is heavy rainfall or irrigation. Runoff is slow or medium, moderately deep to a hardpan. It formed in alluvium and the hazard of water erosion is slight or moderate. derived from mixed rock sources. The native vegetation n The rate of water intake in irrigated areas is 1.5 inches is mainly annual grasses and forbs. Slopes are per hour. complex, and the landscape is characterized by Most areas are used for livestock grazing. A few hummocky microrelief. Elevation is 130 to 350 feet. The areas are used as irrigated pasture or for dryland grain average annual precipitation is about 17 inches, the crops. This unit may provide wetland functions and average annual air temperature is about 60 degrees F, F' values. These should be considered in plans for and the average frost-free period is about 260 days. . enhancement of wildlife habitat or land use conversion. Ypically, the upper part of the surface layer is strong Where this unit is used for livestock grazing, general brown gravelly loam about 7 inches thick. The lower management considerations include saturated soil P. rVis reddish yellow gravelly loam about 9 inches conditions in concave areas following rainy periods, the = tank• The upper part of the subsoil is a claypan of reddish brown clay about 6 inches thick. The lower part F1 i .