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32 Soil Survey
<br /> Typically, the surface layer is dark brown clay loam leveling. Elevation is 70 to 120 feet. The average
<br /> about 23 inches thick. The upper 25 inches of the annual precipitation is about 15 inches, the average
<br /> subsoil is brown and light yellowish brown clay loam. annual air temperature Is about 60 degrees F, and the
<br /> The lower part to a depth of 60 inches is a light average frost-free period is about 270 days.
<br /> yellowish brown, strongly cemented or indurated Typically, the surface layer is brown sandy loam
<br /> hardpan. In some areas the surface layer is loam. about 18 inches thick. The upper 13 inches of the
<br /> Included in this unit are small areas of Archerdale, subsoil is broom sandy clay loam. The lower 36 inches
<br /> Cogna, and Vignolo soils in landscape positions similar is brown, strong brown, and light brown sandy clay
<br /> to those of the Boggiano soil. Also included are small loam. In some areas the surface layer is loam,
<br /> areas of Columbia, Hollenbeck, and Stockton soils in Included in this unit are small areas of San Joaquin,
<br /> the slightly lower positions. Included areas make up Tokay, Kingdon.. Jahant, and Devries soils in the slightly
<br /> about 15 percent of the total acreage. lower landscape positions. Included areas make up
<br /> Permeability is moderately slow in the Boggiano soil. about 15 percent of the total acreage.
<br /> Available water capacity is high. The effective rooting Permeability is moderately slow in the Bruella soil.
<br /> depth is limited by the hardpan at a depth of 40 to 60 Available water capacity is high. The effective rooting
<br /> inches. Depth to the water table is more than 6 feet, but depth is 60 inches or more Depth to the water table is
<br /> water may be briefly perched above the hardpan after more than 6 feet. Runoff is slaw. and the hazard of
<br /> periods of heavy rainfall or irrigation. Runoff is slow, water erosion is slight The rate of water intake in
<br /> and the hazard of water erosion is slight. The rate of irrigated areas is 1.5 inches per hour
<br /> water intake in irrigated areas is 0.5 inch per hour. The Most areas are used for irrigated crops, orchards, or
<br /> soil is subject to rare flooding, which occurs during vineyards. A few areas are used for homesite
<br /> years of abnormally high precipitation. development. This unit may provide wetland functions
<br /> Most areas are used for irrigated crops or orchards. and values. These should be considered In plans for
<br /> �- A few areas are used for homesite development. This enhancement of wildlife habitat or land use conversion.
<br /> unit may provide wetland functions and values. These This unit is well suited to irrigated row, field, orchard,
<br /> should be considered in plans for enhancement of and vineyard crops It has few limitations. Furrow,
<br /> wildlife habitat or land use conversion. border, and sprinkler irrigation systems are suitable.
<br /> This unit is suited to irrigated row, field, and orchard Returning crop residue to the soil or reqularly adding
<br /> crops. The main limitation is depth to the hardpan, other organic material improves fertility. minimizes
<br /> which limits the suitability for deep-rooted crops. Where crusting, and maintains the rate of water intake.
<br /> feasible, deep ripping of this restrictive layer can help to If this unit is used for homesite development, the
<br /> overcome this limitation. Furrow, border, and sprinkler main limitation Is the moderately slow permeability On
<br /> irrigation systems are suitable. Careful applications of sites for septic tank absorption fields, this limitation can
<br /> irrigation water are needed to prevent the buildup of a be overcome by increasing the size of the absorption
<br /> high water table. Returning crop residue to the soil or field
<br /> regularly adding other organic material improves fertility, This map uml is in capability class I (MLRA-17).
<br /> minimizes crusting, and increases the rate of water irrigated. and capability unit lVc-1 (MLRA-17),
<br /> intake. nonimgated. Its in vegetative soil group A
<br /> If this unit is used for homesite development, the
<br /> main limitation is depth to the hardpan. The rare 112—Bruella sandy loam, hard substratum, 0 to 2
<br /> flooding is a hazard. Ripping the hardpan improves percent slopes. This very deep. moderately well
<br /> permeability and thus also improves the suitability of the drained. nearly levet sod is on low terraces. It formed in
<br /> soil for septic tank absorption fields. Houses, roads, and alluvium derived from granitic rock sources. A few areas
<br /> streets should be constructed above expected flood are dissected by intermittent sloughs that have been
<br /> levels. filled as a result of land leveling. Elevation is 70 to 120
<br /> This map unit is in capability units IIs-8 (MLRA-17), feet. The average annual precipitation is about 15
<br /> irrigated, and IVs-8 (MLRA-17), nonirrigated. It is in inches. the average annual air temperature is about 60
<br /> vegetative soil group A. degrees F. and the average frost-free period is about
<br /> 270 days.
<br /> 111—Bruells sandy loam, 0 to 2 percent slopes. Typically, the surface layer is brown sandy loam
<br /> This very deep. well drained, nearly levet sod is on low about 8 inches thick. The upper part of the subsoil is
<br /> terraces. It formed in alluvium derived from granitic rock dark brown and strong brown sandy clay loam about 34
<br /> sources. A few areas are dissected by intermittent inches thick. The lower part to a depth of 60 inches is
<br /> sloughs that have been filled as a result of land strong brown, weakly cemented sandy clay loam. In
<br /> V
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