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<br />The potential plant community on this unit is mainly
<br />western vrheatgrzss and needlegrass. Other grasses that
<br />characterize the unit are Indian ricegrass and sideoats
<br />grama. The average annual production of air-dry
<br />vegetation is about 1,300 pounds per acre. If the
<br />condition of the range deteriorates, sleepygrass,
<br />threeawn, rabbitbrush, and snakegrass increase. Range
<br />seeding is suitable if the range is in poor condtion.
<br />This unit is well suited to windbreaks and
<br />environmental plantings. Supplemental irrigation may be
<br />needed when planting and during dry periods. Among
<br />the trees that are suitable for planting are Russian-olive,
<br />cottornvood, and golden willow. Among the shrubs are
<br />honeysuckle and caragana.
<br />This unit is poorly suited to homesite development. It
<br />is limited mainly by a hazard of flooding if unprotected.
<br />This map unit is in capability subclasses Illc, irrigated,
<br />and IVc, nonirrigated. It is in Loamy Foothills range site.
<br />44-Manzanola clay loam, 0 to 2 percent slopes.
<br />This deep, well drained soil is on terraces and tans. It
<br />formed in calcareous alluvium derived dominantly from
<br />shale. The native vegetation is mainly grass. Elevation is
<br />5,500 to 6,300 feet. The average annual precipitation is
<br />12 to 16 inches, the average annual air temperature is
<br />49 to 54 degrees F, and the average frost-free period is
<br />125 to 165 days.
<br />Typically, the surface layer is light brownish gray clay
<br />loam about 4 inches thick. The subsoil is silty clay loam
<br />about 26 inches thick. The substratum to a depth of 60
<br />inches or more is silly clay loam. The soil is mildly
<br />alkaline to a depth of 7 inches and moderately alkaline
<br />below that depth.
<br />Permeability of this Manzanola soil is slow. Available
<br />water capacity is high. Effective rooting depth is 60
<br />inches or more. Runoff is medium, and the hazard of
<br />wafer erosion is slight.
<br />This unit is used mainly as rangeland. It is also used
<br />as irrigated cropland. Hay and pasture are the main
<br />irrigated crops.
<br />The potential plant community on this unit is mainly
<br />western wheatgrass and blue grama. Other plants that
<br />characterize the unit are fourwing saltbush and vine-
<br />mesquite. The average annual production of air-dry
<br />vegetation is about 1,800 pounds per acre. If the
<br />condition of the range deteriorates, kochia, curlcup
<br />gumweed, and ring muhly increase. Range seeding is
<br />suitable if the range is in poor condtion.
<br />This unit is well suited to i«igated hay and pasture. It
<br />is limited mainly by the slovr permeability of the subsoil.
<br />Water needs to be applied at a slow rate over a long
<br />period of time to insure that the root zone is properly
<br />vretted.
<br />Proper stocking rates, pasture rotation, and restricted
<br />grazing during wet periods help to keep the pasture in
<br />good condition and to protect the soil from erosion.
<br />Nonleguminous crops respond to nitrogen and
<br />phosphorus, and leguminous crops respond to
<br />Soil su
<br />phosphorus. If properly managed, this unit can produc
<br />tons of irrigated alfalfa hay per 2cre.
<br />If this unit is used for windbreaks and environmenta
<br />plantings, the main limitations are slovr permeability a
<br />the droughtiness of the soil. Supplemental irrigation m
<br />be needed vrhen planting and during dry periods. Arne
<br />the trees that are suitable for planting are Russian-oli•.
<br />and Rocky Mountain juniper. Among the shrubs are lit,
<br />and plum.
<br />If this unit is used for homesite development, the m,
<br />limi(ation is shrink-swell potential. The effects of
<br />shrinking and swelling can be reduced by maintaining
<br />constant moisture content around the foundation.
<br />Backfilling with material that has low shrink-swell
<br />potential can also reduce the effects of shrinking and
<br />swelling.
<br />Septic tank absorption fields of conventional size do
<br />not function adequately because of the slow permeab
<br />of the soil. Other kinds of sewage disposal systems m
<br />be needed.
<br />This map unit is in capability subclasses Ills, irrigate
<br />and Vle, nonirrigated. It is in Saline Overllow range sit
<br />45-Manzanola clay loam, 2 to 5 percent slopes.
<br />This deep, well drained soil is on uplands and fans. It
<br />formed in alluvium and residuum derived dominantly Ir
<br />shale. The native vegetation is mainly grass. Elevation
<br />5,500 to 6,400 feet. The average annual precipitation i
<br />12 to 16 inches, the average annual air temperature is
<br />49 to 54 degrees F, and the average frost•free period ,
<br />125 to 165 days.
<br />Typically, the surface layer is light brownish gray cla.
<br />loam about 3 inches thick. The subsoil is silty clay loar
<br />about 29 inches thick. The substratum to a depth of 6(
<br />inches or more is silty clay loam. The soil is mildly
<br />alkaline to a depth of 3 inches and moderately alkaline
<br />below that depth.
<br />Permeability of this Manzanola soil is slow. Available
<br />water capacity is high. Effective rooting depth is 60
<br />inches or more. Runoff is medium to rapid, and the
<br />hazard of water erosion is moderate to high.
<br />Most areas of this unit are used as rangeland. A fe•:.
<br />areas are used for irrigated hay and pasture.
<br />The potential plant community on this unit is mainly
<br />western wheatgrass and blue grama. Other plants that
<br />characterize the unit are founving saltbush and sideoa'.
<br />grama. The average annual production of air-dry
<br />vegetation is about 1,100 pounds per acre. If the
<br />condition of the range deteriorates, ring muhly,
<br />snakevreed, cholla, and pricklypear increase. Range
<br />seeding is suitable if the range is in poor condtion.
<br />If this unit is used for irrigated hay and pasture, the
<br />main limitations are slow permeability and the hazard c
<br />erosion. Water needs to be applied at a slow rate over
<br />long period to insure that the root zone is properly
<br />wetted. Proper grazing practices, weed control, and
<br />fertilizer are needed to insure maximum quality of forac
<br />If properly managed, this unit can produce 3.5 tons of
<br />irrigated alfalfa hay per acre.
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