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San Joaquin County, California
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<br /> Fdesirable 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. derived from mixed rock sources. Typically, the surface
<br /> This map unit is in capability subclass Vle layer is light brown, 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 Beliota soil is in vegetative soil the subsoil is a claypan of reddish brown clay about 6
<br /> group D. inches thick. The lower part to a depth of 60 inches is a
<br /> reddish yellow, indurated hardpan. In some areas the
<br /> F188—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. Available water capacity is very low. The shrink-swell
<br /> FThe 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 of 20 to 40 inches. Roots are
<br /> F; and the average frost-free period is about 270 days. restricted to cracks and the faces of peds in the
<br /> FThis 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 map them separatelyat the scale used.
<br /> 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 /> Fand small areas of Redding soils that have slopes of capacity, saturated soil conditions in concave areas
<br /> Imore than 8 percent. Both of these included soils are in following rainy periods, and the limited depth of the
<br /> landscape positions similar to those of the dominant Keyes soil. The characteristic plant community is mainly
<br /> F-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 /> �-'Iower landscape positions, and soils that have clay at Redding soil. Grazing should be controlled so that
<br /> ` he surface. Included areas make up 15 percent of the desirable vegetation, such as soft chess, is maintained
<br /> fo#al.acreage. and enough vegetation is left standing to protect the
<br /> s . 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 capacity limits the production of desirable forage plants.
<br /> Ffrom mixed rock sources and in material weathered Grazing should be delayed until the soils are firm
<br /> rom basic andesitic, tuffaceous sandstone. Typically, enough to withstand trampling by livestock and the
<br /> ,,the surface layer is grayish brown gravelly loam about 6 more desirable forage plants have had an opportunity to
<br /> ,,the
<br /> thick. The upper part of the subsoil is a claypan set seed. Fencing is difficult because of the depth to
<br /> if 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 Vle
<br /> rardpan 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 /> iedrock is at a depth of 34 inches. In some areas the group D.
<br /> x'surface layer is loam, cobbly loam, or gravelly sandy
<br /> oam. 189—Kingdon fine sandy loam, 0 to 2 percent
<br /> ;,.::Permeability is very slow in the Keyes soil. Available slopes. This very deep, moderately well drained, nearly
<br /> water capacity is very low. The shrink-swell potential is level soil is on low fan terraces. It formed in alluvium
<br /> igh. The effective rooting depth is limited by the derived from granitic rock sources. A few areas are
<br /> riardpan, which is at a depth of 10 to 20 inches and is dissected by intermittent sloughs that have been filled
<br /> d
<br /> ,underlain by bedrock. Roots are restricted to cracks and because of land leveling. Elevation is 10 to 150 feet.
<br /> ,,the faces of peds in the claypan, which is at a depth of The average annual precipitation is about 15 inches,
<br /> to 17 inches. Water is briefly perched above the the average annual air temperature is about 60 degrees
<br /> .claypan and hardpan after periods of heavy rainfall. F, and the average frost-free period is about 260 days.
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