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