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' 104 Soil Survey of 63 inches is brown loam. In some areas the surface underlying material is brown and grayish brown, ' layer is sandy loam. stratified fine sandy loam, loamy sand, and loamy fine Included in this unit are small areas of Coyotecreek sand. The lower part to a depth of 60 inches is pale soils in landscape positions similar to those of the Reiff brown loam. In some areas the surface layer is sandy soil and San Joaquin soils on the slightly higher loam. terraces. Also Included are small areas of soils that are Included in this unit are small areas of Capay, gravelly and moderately coarse textured and are on Stomar, and Zacharias soils in the slightly lower complex slopes resulting from channeling and landscape positions. Also included, in landscape ' deposition in drainageways. Included areas make up positions similar to those of the Reiff soil, are small about 15 percent of the total acreage. areas of moderately coarse textured soils that have a Permeability is moderately rapid in the Reiff soil. surface layer of gravelly or cobbly sandy loam and ' Available water capacity is moderate. The effective moderately coarse textured soils that have medium rooting depth is 60 inches or more. Runoff is slow, and textured or moderately fine textured layers below a the hazard of water erosion is slight. The rate of water depth of 30 inches. Included areas make up about 15 intake in irrigated areas is 1.5 inches per hour. The percent of the total acreage. ' hazard of soil blowing is slight. The soil is subject to Permeability is moderately rapid in the Reiff soil. occasional, very brief or brief periods of flooding from Available water capacity is moderate. The effective December through April. rooting depth is 60 inches or more. Runoff is slow, and t Most areas are used for dryland grain crops. A few the hazard of water erosion is slight. The rate of water areas are used for irrigated crops. This unit may intake in irrigated areas is 1.5 inches per hour. The provide wetland functions and values. These should be hazard of soil blowing is slight. The soil is subject to considered in plans for enhancement of wildlife habitat rare flooding, which occurs during years of abnormally ' or land use conversion. high precipitation. Where this unit is used for dryland grain crops, the Most areas of this unit are used for Irrigated crops or main limitation is low rainfall during the growing season. orchards. A few areas are used for dryland grain crops ' The occasional flooding is a hazard. Because the or for homesite development. amount of precipitation is not sufficient for annual This unit is suited to Irrigated row, field, and orchard cropping, the best suited cropping system is one that crops. It has few limitations. Furrow, border, and includes small grain and summer fallow. The risk of sprinkler irrigation systems are suitable. Maintaining ' flooding can be reduced by levees and diversions. crop residue on or near the surface helps to prevent Maintaining crop residue on or near the surface helps to excessive runoff and soil blowing and helps to maintain prevent excessive runoff and soil blowing and helps to the rate of water intake and the organic matter content. ' maintain tilth and the organic matter content. Where this unit is used for dryland grain crops, the This unit is suited to irrigated row and field crops, main limitation is low rainfall during the growing season. The occasional flooding is a hazard. The risk of flooding Because the amount of precipitation is not sufficient for can be reduced by levees and diversions. Furrow, annual cropping, the best suited cropping system is one border, and sprinkler irrigation systems are suitable. that includes small grain and summer fallow. Maintaining crop residue on or near the surface helps to Maintaining crop residue on or near the surface helps to prevent excessive runoff and soil blowing and helps to prevent excessive runoff and helps to maintain tilth and ' maintain the rate of water intake and the organic matter the organic matter content. content. If this unit is used for homesite development, general This map unit is in capability units Ilw-2 (MLRA-17), management considerations include the rare flooding. irrigated, and IVw-2 (MLRA-17), nonirrigated. It is in Roads and streets should be located above expected vegetative soil group A. flood levels. This map unit is in capability units IIs-0 (MLRA-17), 223—Reiff loam, 0 to 2 percent slopes. This very irrigated, and IVs-0 (MLRA-17), nonirrigated. It is in ' deep, well drained, nearly level soil is on alluvial fans. It vegetative soil group A. formed in alluvium derived from mixed rock sources. Elevation is 50 to 300 feet. The average annual 224—Rindge mucky silt loam, partially drained, 0 precipitation is about 10 inches, the average annual air to 2 percent slopes, overwashed. This very deep, very ' temperature is about 60 degrees F, and the average poorly drained, nearly level soil is on deltas_ It formed in frost-free period is about 270 days. hydrophytic plant remains derived from reeds and tules Typically, the surface layer is grayish brown loam and in alluvium derived from mixed rock sources. ' about 7 inches thick. The upper 48 inches of the Levees, drainage ditches, and pumping of the water