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–�,'San Joaquin County, California
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<br /> desirable forage plants. Grazing should be delayed until Runoff is slow or medium, and the hazard of water
<br /> the soils are firm enough to withstand trampling by erosion is slight or moderate.
<br /> 'livestock and the more desirable forage plants have had The Redding soil is moderately deep to a hardpan
<br /> an opportunity to set seed. Fencing is difficult because and is moderately well drained. It formed in alluvium
<br /> of the depth to bedrock.
<br /> This map unit is in capability subclass Vie derived from mixed rock sources. Typically, the surface
<br /> -
<br /> b
<br /> layer is light r
<br /> Y g own, strong brown, and reddish yellow
<br /> (MLRA-17), nonirrigated. The Keyes soil is in vegetative gravelly loam about 16 inches thick. The upper part of
<br /> soil group G, and the Bellota soil is in vegetative soil the subsoil is a claypan of reddish brown clay about 6
<br /> group D.
<br /> inches thick. The lowerart t
<br /> p o a depth of 60 inches is a
<br /> reddish yellow, indurated hardpan. In some areas the
<br /> F ':188—Keyes-Redding complex, 2 to 8 percent surface layer is gravelly sandy loam, cobbly loam, or
<br /> slopes. These undulating and gently rolling soils are on loam,
<br /> high terraces and hills. The native vegetation is mainly Permeability is very slow in the Redding soil.
<br /> annual grasses and forbs. Elevation is 125 to 200 feet.
<br /> Available water capacity is very low. The shrink-swell
<br /> The average annual precipitation is about 17 inches, potential is high. The effective rooting depth is limited
<br /> the average annual air temperature is about 60 degrees by the hardpan at a depth
<br /> F; and the average frost-free period is about 270 days. restricted to cracks and the faces of Peds ininches.
<br /> theoots are
<br /> This unit is 45 percent Keyes gravelly loam and 40 claypan, which is at a depth of 16 to 36 inches. Water
<br /> percent Redding gravelly loam. The Redding soil is on is briefly perched above the claypan after periods of
<br /> concave or convex slopes, and the Keyes soil is on heavy rainfall. Runoff is slow or medium, and the
<br /> concave slopes. The components of this unit occur as hazard of water erosion is slight or moderate.
<br /> ' areas so intricately intermingled that it was not practical This unit is used mainly for livestock grazing. General
<br /> to reap them separately at the scale used. management considerations include the hazard of
<br /> Included in this unit are small areas of Bellota soils erosion in rolling areas, the very low available water
<br /> [and small areas of Redding soils that have slopes of capacity, saturated soil conditions in concave areas
<br /> more than 8 percent. Both of these included soils are in followingrainy Y p eriod
<br /> s, and the limited depth of the �
<br /> °landscape positions similar to those of the dominant Keyes soil. The characteristic plant community is mainly
<br /> Keyes and Redding soils. Also included are small areas soft chess, wild oat, and filaree on the Keyes soil and
<br /> of Pardee soils on terraces, Peters soils in the slightly soft chess, ripgut brome, wild oat, and filaree on the
<br /> ':lower landscape positions, and soils that have clay at Redding soil. Grazing should be controlled so that
<br /> F.the surface. Included areas make up 15 percent of the desirable vegetation, such as soft chess, is maintained
<br /> totai acreage. and enough vegetation is left standing to protect the
<br /> The Keyes soil is shallow to a hardpan and is soils from erosion. The very low available water
<br /> -.moderately well drained. It formed in alluvium derived
<br /> i" capacity limits the production of desirable forage plants.
<br /> from mixed rock sources and in material weathered
<br /> basic andesitic, tuffaceous sandstone. Typically, Grazing should be delayed until the soils are firmFlfrorn enou h to withstand tr by
<br /> ;.. ock and the
<br /> the surface layer is grayish brown gravelly loam about 6 more desirable forage p ants ghave f�had tan opportunity to
<br /> inches thick. The upper part of the subsoil is a claypan set seed. Fencing is difficult because of the depth to
<br /> of brown gravelly clay about 7 inches thick. The lower bedrock,
<br /> .-part is a yellowish brown, moderately cemented This map unit is in capability subclass Vie
<br /> F�bhardpan about 21 inches thick. Light gray, weakly (MLRA-17), nonirrigated. The Keyes soil is in vegetative
<br /> onsolidated, basic andesitic, tuffaceous sandstone soil group G, and the Redding soil is in vegetative soil
<br /> eqrock is at a depth of 34 inches. In some areas therou D.
<br /> -'surface layer is loam, cobbly loam, or gravelly sandy g p
<br /> F'loam. 189—Kingdon fine sandy loam, a to 2 percent
<br /> , Permeability is very slow in the Keyes soil. Available slopes. This ver deepmoderately
<br /> water capacity is very low. The shrink-swell potential is level soil is on I w fanterraes. It formed in lalludvium nearly
<br /> high. The effective rooting depth is limited by the derived from granitic rock sources. A few areas are
<br /> hardpan, which is at a depth of 10 to 20 inches and is dissected by intermittent sloughs that have been filled
<br /> underlain by bedrock. Roots are restricted to cracks and because of land leveling. Elevation is 10 to 150 feet.
<br /> r,ciathe faces of peds in the claypan, which is at a depth of The average annual precipitation is about 15 inches,
<br /> 6 to 17 inches. Water is briefly perched above the the average annual air temperature is about 60 degrees
<br /> ypan and hardpan after periods of heav raint II
<br /> V° Y a F, and the average frost-free period is about 260 days.
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