|
96 Scil SUr.,,__
<br /> soils on terraces, Keyes soils in landscape positions Pentz soil. The characteristic plant community is ma-
<br /> similar
<br /> to those of the Pentz and Bellota soils, and soft chess, ripgut brome, and filaree on the Pentz s,,
<br /> Peters soils in the slightly lower positions. Also included and soft chess, mouse barley, annual ryegrass, and
<br /> are small areas of soils that have clay at the surface filaree on the Bellota soil. The very low or low availa`
<br /> and, near Bear Creek, small areas of moderately fine water capacity limits the production of desirable fora;
<br /> textured soils that have a hardpan and formed in plants. Grazing should be delayed until the soils are
<br /> material weathered from granitic sediments. Included firm enough to withstand trampling by livestock and
<br /> areas make up 15 percent of the total acreage. more desirable forage plants have had an opportun t
<br /> The Pentz soil is shallow and well drained. It formed set seed. Grazing should be controlled so that desire: . ;
<br /> in material weathered from basic andesitic, tuffaceous vegetation, such as soft chess, is maintained and
<br /> sandstone. Typically, the surface layer is grayish brown enough vegetation is left standing to protect the soils
<br /> loam about 7 inches thick. The subsoil is dark brown from erosion. Loss of the surface layer results in a
<br /> loam about 7 inches thick. Light yellowish brown, severe decrease in productivity and in the potential c
<br /> weakly consolidated, basic andesitic, tuffaceous the unit to produce plants suitable for grazing. Fencir
<br /> sandstone bedrock is at a depth of 14 inches. In some is difficult because of the depth to bedrock.
<br /> areas the surface layer is sandy loam, gravelly loam, or This map unit is in capability subclass Vle
<br /> cobbly loam. (MLRA-18), nonirrigated. The Pentz soil is in vegeta:
<br /> Permeability is moderately rapid in the Pentz soil. soil group G, the Bellota soil is in vegetative soil gro
<br /> Available water capacity is very low. The effective D.
<br /> rooting depth is limited by the bedrock at a depth of 10
<br /> to 20 inches. Runoff is slow or medium, and the hazard 210—Pentz-Redding complex, 2 to 15 percent
<br /> of water erosion is slight or moderate. slopes. These undulating to rolling soils are on hills :.:,d
<br /> The Bellota soil is moderately deep to a hardpan and the side slopes of high terraces. Slopes are convex.
<br /> is moderately well drained. It formed in alluvium derived The native vegetation is mainly annual grasses and
<br /> from mixed rock sources and in material weathered forbs. Elevation is 135 to 300 feet. The average ann.: ;I
<br /> from basic andesitic, tuffaceous sandstone. Typically, precipitation is about 17 inches, the average annual , r
<br /> the surface layer is grayish brown loam about 17 inches temperature is about 60 degrees F, and the average
<br /> thick. The upper part of the subsoil is brown gravelly frost-free period is about 270 days.
<br /> clay loam about 4 inches thick. The next part is a This unit is 55 percent Pentz gravelly sandy loam
<br /> claypan of dark grayish brown clay about 15 inches and 30 percent Redding gravelly sandy loam. The
<br /> thick. The lower part is a light grayish brown hardpan components of this unit occur as areas so intricately
<br /> about 1 inch thick. Light gray, moderately consolidated, intermingled that it was not practical to map them
<br /> basic andesitic, tuffaceous sandstone bedrock is at a separately at the scale used.
<br /> depth of 37 inches. In some areas the surface layer is Included in this unit are small areas of Redding s: 7
<br /> sandy loam, gravelly loam, or cobbly loam. that have slopes of 0 to 2 percent. These soils are
<br /> Permeability is very slow in the Bellota soil. Available toe slopes. Also included are small areas of Lithic
<br /> water capacity is low. The shrink-swell potential is high. Xerorthents in convex positions near the top of the
<br /> The effective rooting depth is limited by the hardpan, slopes and Hicksville soils in drainageways. Include,
<br /> which is at a depth of 20 to 40 inches and is underlain areas make up about 15 percent of the total acreag,
<br /> by bedrock. Roots are restricted to cracks and the faces The Pentz soil is shallow and well drained. It form .l
<br /> of peds in the claypan, which is at a depth of 12 to 30 in material weathered from consolidated sediments
<br /> inches. Water is briefly perched above the claypan and derived from basic andesitic rock sources. Typically, e
<br /> hardpan after periods of heavy rainfall. Runoff is slow or surface layer is grayish brown gravelly sandy loam
<br /> medium, and the hazard of water erosion is slight or about 10 inches thick. The subsoil is yellowish brow
<br /> moderate. gravelly sandy loam about 4 inches thick. Light gray.
<br /> Most areas are used for livestock grazing. This unit moderately consolidated, basic andesitic, tuffaceous
<br /> may provide wetland functions and values. These sandstone bedrock is at a depth of 14 inches. In sor
<br /> should be considered in plans for enhancement of areas the surface layer is sandy loam, loam, or gra- /
<br /> wildlife habitat or land use conversion. loam.
<br /> Where this unit is used for livestock grazing, general Permeability is moderately rapid in the Pentz soil
<br /> management considerations include the very low or low Available water capacity is very low. The effective
<br /> available water capacity, saturated soil conditions in rooting depth is limited by the bedrock at a depth or
<br /> concave areas following rainy periods, the hazard of to 20 inches. Runoff is slow or medium, and the ha f
<br /> erosion in rolling areas, and the limited depth of the of water erosion is slight or moderate.
<br />
|