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L
<br /> Soil Survey
<br /> 72
<br /> nonirrigated. It is in
<br /> intricately intermingled that it was not practical to ma
<br /> irrigated, and IVe 5 (MCRA 17), 9 them separately at the scale used.
<br /> Included in this unit are small areas of Honker,
<br /> vegetative soil group C.
<br /> Gonzaga, and Vallecitos soils that have slopes of mer'
<br /> loam, 0 to 2 percent slopes. than 50 or less than 30 percent and small areas of
<br /> 175—Honcut sandy near) level soil is on
<br /> This very deep, well drained, Y granitic Franciscan soils. All of these included soils are to
<br /> landscape positions similar to those of the dominant
<br /> alluvial fans. It formed in alluvium derived from 9 Honker, Vallecitos, and Gonzaga soils. Also included
<br /> rock sources. Elevation is 30 to 125 feet. The average
<br /> annual precipitation is about 11 inches, the average
<br /> and the are areas of exposed bedrock and eroded Honker soils
<br /> ut 60 degrees F, in convex positions near the top of the slopes.
<br /> annual air temperature is aboIncluded
<br /> average frost-free period is about 270 days• loam areas make up about 15 percent of theand well drained.,-.
<br /> material to a The Honker soil is moderately deep
<br /> Typically, the surface layer is brown sandy
<br /> about 21 inches thick. The underlying
<br /> lowish brown sandy It formed in material weathered from sandstone.
<br /> depth of 60 inches is brown and Y layer is fine sandy Typically, the surface layer is brown loam about 5
<br /> loam. In some areas the surface lay loam inches thick. gra subsoil is a elly clay aboutpan of brown 28 inchesthick. Hard
<br /> coarse sandy loam, or gravelly sandy strong brown gravelly
<br /> loam, sandstone bedrock is at a depth of 33 inches. In some
<br /> L. Included i, this unit are small areas of Ce positions gravelly loam, gravelly clay
<br /> areas the surface layer is g Y
<br /> Delhi, Tinnin, and Veritas soils o . Include P loam, or clay loam.
<br /> similar to those of the Honcut soil. Included areas make Permeability is very slow in the Honker soil. Available
<br /> up about 15 percent of the total acreage.
<br /> Permeability is moderately rapid in the Honcut soil. water capacity is low. Thetis srl mit-swell
<br /> the is high.at
<br /> The effective rooting depth Available water capacity is moderate. The effective a depth of 20 to 40 inches. Roots are restricted to
<br /> rooting depth is 60 inches or more. Runoff is slow, and an, which is at:
<br /> per hour. The cracks and the faces of peds in the claypd and the a
<br /> L the hazard of water erosion is slight. The rate of water a depth of 10 to 20 inches. Runoff is rap
<br /> intake in irrigated areas is 1.5 inches p hazard of water erosion is severe.
<br /> hazard of soil blowing is moderate. Typicall
<br /> L The Vallecitos Boit is shallow and well drained. It
<br /> Most areas of this unit are used for irrigated crops,
<br /> orchards, or vineyards. A few areas are used for formed in material weathered from dloam about 4 Y1
<br /> homesite development. field, orchard, the surface layer is pale brown gravelly
<br /> This unit is well suited to irrigated row, inches thick. The subsoil is pale brown and brov,n
<br /> L and vineyard crops. General managementgravelly clay loam about 16 inches of 20 inches. In some,
<br /> sandstone bedrock is at a depthcla loam, or gravelly
<br /> ,I considerations include the hazard of soil blowing areas the surface layer is loam, Y
<br /> I Furrow, border, e anp rmis easirrigation
<br /> y tit the soil sstilled clay loam.
<br /> L suitable. A tillage p the pan. y
<br /> when wet. Chiseling or subsoiling breaks up Permeability is slow in the Vallecitos soil. Available
<br /> When the wind velocity is high in spring, the hazard of water capacity is very low. The shrink-swell Potential's
<br /> managing all de th is limited by
<br /> I soil blowing can be reduced by properly high. The effective rooting P
<br /> 60 crop residue and by minimizing tillage. bedrock at a depth of 10 to 20 inches. Runoff is rape:
<br /> and the hazard of water erosion is severe.and welt
<br /> Few limitations affect the use of this unit for homesite The Gonzaga soil is moderately deep
<br /> L development.
<br /> This map unit is in capability class 1 (MLRA-17), drained. It formed in material weathered from shale.
<br /> capability unit IVc-1 (MLRA-17), Typically, the upper 3 inches df the surface layer is
<br /> irrigated, and cap Y 1 i,h
<br /> nonirrigated. It is in vegetative soil group A. grayish brown loam. The lower 4 inches an of reddish
<br /> a complex, 30 to 50 brown clay loam. The subsoil is a clabout 27 inches in
<br /> 176—Honker-Vallecitos-Gonzag brown and light reddish brown clay , inches
<br /> percent slopes.These steep soils are on both south thick'
<br /> Hard shale bedrock is at a depth ol0 3" °r
<br /> facing and north-facing slopes on mountain s. The native some areas the surface layer is g y
<br /> grasses, forbs, and blue rav 'lly clay loam.
<br /> vegetation is mainly annual ggrave
<br /> permeability is very slow in the Gonzaga s;.'',.
<br /> oak. Elevation is 800 to 3,300 feet. The average annual 9 `rill
<br /> ` precipitation is 12 to 18 inches, the average annual air rn',y lim d
<br /> Available water capacity is low. The shrin - e
<br /> potential is high. The effective rooting dep a
<br /> L temperature is about 60 degrees F. and the average by the bedrock at a depth of 20 to 40 inche- Roots
<br /> frost-free period is 200 to 240 days. 30 percent eds ''
<br /> l This unit is 30 percent Honker loam, P restricted to cracks and the faces of p R��ofl
<br /> Vallecitos gravelly loam, and 25 percent Gonzaga loam. claypan, which is at a depth of 4 to 20 ind ,
<br /> 4 The components of this unit occur as areas so
<br /> l: '_
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