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1
<br /> ��•n Jo"M County, Califomia 61
<br /> 159--Fluvaquerns, 0 to 2 perc*nt slopes, Included in this unit are small areas of Archerdaie
<br /> *"uentty flooded. These very deep, poorly and very and Vignolo soils on the slightly higher parts of the
<br /> poorly drained, nearly level soils are, lar>
<br /> on low flood plains landscape, Hollenbeck and Stockton soils in dscape
<br /> and interchannel bars and in tidal marshes on deltas. positions similar to those of the Gaft soil, and Pettier
<br /> They formed in mineral sediments derived from mixed soils in the slightly lower landscape positions. Also
<br /> rock sources and in hydrophytic plant remains derived included are small areas of Galt soils that have
<br /> from reeds and tules. Elevation is 5 feet below sea level moderately coarse textured or moderately fine textured
<br /> to 5 feet above. The average annual precipitation is overburden and are on the slightly higher parts of the
<br /> about 14 inches, the average annual air temperature is landscape and Galt soils that are highly calcareous or
<br /> mut 60 degrees F, and the average frost-free period is saline-sodic and are in landscape positions similar to
<br /> about 270 days. those of the dominant Gait sod. Included areas make up
<br /> Typically, the surface layer is gray, mottled sifty clay about 15 percent of the total acreage.
<br /> loam about 14 inches thick. The underlying material to a Permeability is slow in the Galt soil. Available wafer
<br /> depth of 60 inches is stratified gray, dark gray, and capacity is low. The shrink-swell potential is high. The
<br /> olive, mottled fine sandy loam, sift loam, and silty day effective rooting depth is knilled by the hardpan at a
<br /> losm. In some areas the surface layer is mucky loam or depth of 20 to 40 inches. Depth to the water table is
<br /> mucky day loam. more than 6 feet, but water may be very briefly perched
<br /> Included in this unit are small areas of Columbia, above the hardpan after periods of heavy mintalll or
<br /> Kingile, Peltier, and Ryde soils on the slightly higher irrigation. Runoff Is slow, and the hazard of wa*
<br /> parts of the landscape. Included areas make up about erasion is slight The rated water kttake in I:T4ded
<br /> 15 percent of the total acreage. areas is 0.1 Inch per hour. The soil is subject b rare
<br /> Permeability is slow to moderately rapid in the flooding, which occurs during years of abnormally high
<br /> C Fluvaquents. Available water capacity Is low to high. predpitalion.
<br /> •e effective roofing depth is limited by an apparent Most areas are used for irrigated crops. A few areas
<br /> ,ater table at a depth of 6 to 24 inches throughout the are used as irrigated pasture or for homesits
<br /> year. Runoff is very slow, and the hazard of water development. This unit may provide wetland functions
<br /> erosion is slight. These soils are subject to frequent, and values. These should be considered in plans for
<br /> long periods of flooding from November through April. enhancement of wildlife habitat or land use conversion.
<br /> Channeling and deposition are common along _ This-unit is suited to irrigated row and field sops.
<br /> streambanks. The main limitations are the slow perrneabift. tfne low
<br /> This unit is used mainly for wildlife habitat. It may available water capacity,and depth to trine hardpan.
<br /> provide wetland functions and values. These should be Because of the restricted permeability, water
<br /> considered in plans for enhancement of wildlife habitat applications should be regulated so that the water does
<br /> or land use conversion. not stand on the surface and damage the crops.
<br /> This map unit is in capability subclass Vllw Because the soil is droughty, applications of krigation
<br /> (MLRA-16), nonirrigated. ft is in vegetative soil group E. water should be light and frequent- The hardpan omits
<br /> the suitability for deep-rooted crops. Where feasible,
<br /> 160--Galt clay, 0 to 2 percent slopes. This deep ripping of this restrictive layer can help to
<br /> moderately well drained, nearly level soil is on basin overcome this limitation.The soil should be cultivated
<br /> rims and in basins. It is moderately deep to a hardpan. only within a narrow range of moisture content It is too
<br /> it formed In alluvium derived from mixed rock sources. sticky when wet and too hard when dry. Furrow, border,
<br /> A few areas are dissected by intermittent sloughs that and sprinkler irrigation systems are suitable. Returning
<br /> have been filled as a result of land leveling. Elevation is crop residue to the soil or regularly adding other organic
<br /> 20 to 100 feet. The average annual precipitation is material improves fertility.minimizes crusting, and
<br /> about 14 inches, the average annual air temperature is increases the rate of water intake.
<br /> about 60 degrees F. and the average frost-free period is This unit is suited to irrigated pasture. Irrigation water
<br /> about 270 days. can be applied by sprinkler and border methods.
<br /> Typically, the surface layer is grayish brown and dark Leveling helps to ensure a uniform application of water.
<br /> ;grayish brown day about 25 inches thick. The upper 9 Proper stocking rates, pasture rotation, and restricted
<br /> nches of the subsoil is dark grayish brown clay. The grazing during wet periods help to keep the pasture in
<br /> ower part to a depth of 60 Inches is a variegated light good condition and protect the soil from oompaction.
<br /> yellowish brown, dark grayish brown, and white, weakly ft this unit is used for homesite development.the
<br /> cemented hardpan. In some areas the surface layer Is main limitations are the high shrink-swell potential, low
<br /> anty pay, strength, the slow permeability, and depth to the
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