|
r�4.
<br /> I San Joaquin County, California
<br /> 103 .
<br /> I ,,hazard of erosion, and the very low available water
<br /> ,.,capacity. The characteristic plant community is mainly to a depth of 60 inches is a reddish yellow and
<br /> Yellowish red, indurated hardpan. In some areas the
<br /> soft chess, ripgut brome, (oxtail fescue, and filaree.
<br /> f k:,Grazing should be delayed until the soil is firm enough surface layer is gravelly sandy foam, cobbly foam, or
<br /> to withstand trampling by livestock and the more
<br /> esirable forage plants have had an opportunit to set Included in this unit are small areas of Bellota and
<br /> Y Pardee soils on terraces and shallow, medium textured
<br /> seed. Grazing should be controlled so that desirable
<br /> soils that have a claypan at a depth of 10 to 15 inche§
<br /> vegetation, such as soft chess, is maintained and and are in landscape positions similar to those of the
<br /> ,'enough vegetation is left standing to protect the soil Reddi
<br /> from erosion. The very low available water ca acit ng soil. Also included are small areas of Alamo
<br /> p Y and Yeilowlark soils in drainageways, Peutz soils on the
<br /> limits the production of desirable forage plants. slightly higher terraces, Peters sails in the slightly lower
<br /> This unit is suited to irrigated pasture. The main
<br /> landscape positions, and Redding soils that have slopes
<br /> fimitation is the very low available water capacity. of 2 to 8 percent and are on toe slopes. Included areas
<br /> General management considerations include the hazard make up about 15 percent of the total acreage.
<br /> of erosion. Because the soil is droughty, applications of g
<br /> irrigation water should be light and frequent. The water Available water icapac capacity is ververy Slow in y adding soil.
<br /> can be applied by sprinkler and border methods. Y rY The shrink-swell
<br /> Seedbed preparation should be on the contour or by potential is high. The effective rooting depth is limited
<br /> across the slope where practical. Proper stocking rates, restricted to
<br /> ata depth of c to 40 inches. Roots are
<br /> ;:pasture rotation, and restricted grazing during wetclaypan,
<br /> ed to cracks and the faces of pads in the
<br /> :`,periods help to keep the pasture in good condition and cll b efl, which is at a depth of 16 to 22 inches. Water
<br /> protect the soil from erosion. g Y perched above the claypan after periods of
<br /> Where this unit is used for dryland grain crops, the heavy rainfall. Runoff is medium or rapid, and the
<br /> hazard of water erosion is moderate or severe.
<br /> r:;'main
<br /> limitation is low rainfall during the growing season. Most areas are used for livestock grazing. This unit
<br /> General management considerations include the hazard. may provide wetland functions and values. These
<br /> Of erosion. Because the amount of precipitation f} p on is not should be considered in plans for enhancement of
<br /> sufficient for annual cropping, the best suited cro in i
<br /> system is one that includes sinal! grain and summer g wildlife habitat or land use conversion.
<br /> fallow. All tillage should be on the contour or across the man'ahere ement unit is used for livestock
<br /> grazing,g, general
<br /> slope. Limiting tillage during seedbed preparation and g considerations include the hazard of
<br /> erosion and the very low available water capacity. The
<br /> during the application of weed-control measures helps characteristic plant community is mainly soft chess,
<br /> to control runoff and erosion. Leavingcrop residue on n p ripgut brome, foxtail fescue, and filaree.
<br /> ear the surface helps to conserve moisture, Grazing should
<br /> maintain tifth, and control erosion. be controlled so that desirable vegetation, such as soft
<br /> .Y
<br /> + ` MLRA-17 chess, is maintained and enough vegetation is left
<br /> This map unit is in capability unit IVa-3 V
<br /> standing to protect the soil from erosion. Loss of the 1
<br /> irrigated and nonirrigated. !t is in vegetative soil
<br /> ig group surface layer results in a severe decrease in
<br /> ON
<br /> productivity and in the potential of the unit to produce
<br /> plants suitable for grazing. The very low available water
<br /> F_ 221—Redding gravelly loam, 8 to 30 percent
<br /> lopes. This moderately well drained, rolling to capacity limits the production of desirable forage plants.
<br /> This map unit is in capability unit lVeF -3 {MLRA-17),
<br /> y moderately steep soil is on dissected high terraces. It is nonirrigated. It is in vegetative soil,group D.
<br /> moderately deep to a hardpan. It formed in alluvium
<br /> -;derived from mixed rock sources. The native vegetation 222--Reiff fine sandy loam, 0 to 2 percent slopes,
<br /> V'is mainly annual grasses and fortis. Slopes are
<br /> p occasionally flooded. This very deep, well drained,
<br /> complex, and the landscape is characterized by nearly level soil is on flood plains. It formed in alluvium
<br />�nummocky rr►icrorelief. Elevation is i 30 to
<br />?: 350 feet. The derived from mixed rock sources. Elevation is 80 to 165
<br />.;average annual precipitation is about 17 inches, the
<br /> feet. The average annual pitation is about 16
<br /> verage annual air temperature is about 60 degrees F, inches, the average annual rair ittemperaturre s about
<br /> end the average frost-free period is about 260 da ut 60
<br /> s.
<br /> Typically, the upper part of the surface layer is strong 270daysE, and the average frost-free period is about
<br /> : . . .
<br /> Fbrown gravelly loam about 7 inches thick. The lower Typically, the surface layer is brown fine sandy loam
<br /> .::Sart is reddish yellow gravelly loam about 9 inches
<br /> hick. The u about 9 inches thick. The upper 47 inches of the
<br /> pper part of the subsoil is a claypan of underlying material is brown and pale brown, stratified
<br /> reddish brown clay about 6 inches thick. The lower part loamy sand and sandy loam. The lower part to a depth
<br />
|