36
<br />Soil Survey
<br />~.
<br />cro and provides food and shelter for some wit ife.
<br />Nativ angeland and nearby areas of pinyon d juniper
<br />provide elter and nesting areas. Suitable anagement
<br />for wildlife ould include protecting the u t from
<br />overgrazing, oviding protection from ' dfire, and
<br />maintaining ade ate plant cover, in ding areas of
<br />pinyon and junipe . In cropland are ,favorable habitat
<br />can be developed b maintainin lant cover along
<br />fences and ditches an in cor rs of fields.
<br />Low soil strength and h hrink-swell potential are
<br />the main limitations for ho site and urban
<br />development. The foun ion of buildings should be
<br />designed to compen a for the igh shrink-swell
<br />potential of the soi oads shout a designed to
<br />overcome the li ' ations of low soil ength and high
<br />shrink-swell p ntial. The slow perme ility should be
<br />considered en planning septic tank ab rption fields.
<br />Sewage I oons work well if the limitation slope is
<br />T ' map unit is in capability subclass IVe, irrTaated
<br />a nonirrigated. v
<br />I
<br />28-Fluvaquents, sandy, frequently flooded. This
<br />unit consists of deep, somewhat poorly drained and
<br />poorly drained, nearly level soils that formed in recent
<br />alluvial deposits bordering major drainageways on alluvial
<br />valley floors. The areas are dissected by old river
<br />channels and by smaller streams. Elevation is 6,000 to
<br />8,000 feet. The average annual precipitation is 15 to 20
<br />inches. The average annual air temperature is 42 to 50
<br />degrees F, and the frost-free period is 90 to 130 days.
<br />The soils in this unit are extremely variable. The
<br />surface layer ranges from gravelly or cobbly loam to
<br />sandy loam. Stratified sandy loam, sand, and gravel are
<br />at a depth of 5 to 20 inches.
<br />Permeability of these Fluvaquents is moderately rapid
<br />or rapid. Effective rooting depth is 12 to 40 inches or
<br />more because of the presence of a fluctuating water
<br />table. Available water capacity is very low to low. Runoff
<br />is slow, and the hazard of erosion is slight. The soils
<br />have a fluctuating water table between depths of 12 and
<br />40 inches year round.
<br />Included in this unit are small areas of Pescar fine
<br />sandy loam, Teflon loam, Riverwash, gravel, and sand
<br />bars.
<br />This unit is used for livestock grazing and wildlife
<br />habitat.
<br />The native vegetation is mainly cottonwood, willows,
<br />sedges, rushes, tufted hairgrass, yarrow, and iris. Proper
<br />grazing use as part of a planned grazing system helps to
<br />maintain the desired quality and quantity of the
<br />rangeland vegetation. Deferred grazing facilitates
<br />revegetation and improves areas of rangeland in poor
<br />condition. Brush control may be needed in some places.
<br />Wildlife such as squirrel, mule deer, coyote, rabbit, and
<br />waterfowl use this unit. The unit is suited to the
<br />production of wetland plants that provide nesting areas,
<br />protective cover, and food for waterfowl. The location of
<br />this unit near areas of irrigated cropland makes it
<br />valuable to both wetland and rangeland wildlife. Suitable
<br />management for wildlife should include protecting the
<br />unit from overgrazing.
<br />If this unit is used for homesite development, the main
<br />limitations are the fluctuating water table and hazard of
<br />flooding. Buildings and roads should be designed to
<br />overcome these limitations. These limitations restrict the
<br />construction of sewage systems and may contribute to
<br />the pollution of ground water. Drainage and protection
<br />from flooding should be established before construction
<br />is begun.
<br />This map unit is in capability subclass Vllw,
<br />nonirrigated.
<br />2 Fortwingate stony sandy loam, 3 to 12 percent
<br />slop .This moderately deep, well drained soil is on
<br />mount 'nsides. It formed in material derived from
<br />sandsto a and mixed with loess. Elevation is 7, 0 to
<br />8,800 fe .The average annual precipitation is 8 to 22
<br />inches. Th average annual air temperature 4 to 45
<br />degrees F, nd the frost-free period is 90 to 10 days.
<br />Typically, t e surface is covered with a la r of organic
<br />material 1 inc thick. The surface layer is b own stony
<br />fine sandy loa about 1 inch thick. Then layer is
<br />pinkish gray sto fine sandy loam about inches thick.
<br />The upper part o the subsoil is light bro n loam about 5
<br />inches thick, the n xt part is reddish br n clay loam
<br />about 13 inches thi k, and the lower p rt is reddish
<br />yellow stony sandy lay loam about 7 nches thick over
<br />sandstone. sandsto commonly is t a depth of 20 to
<br />40 inches. In some pl ces the surf ce layer is stony
<br />loam.
<br />Included in this unit a e about 5 percent Goldvale
<br />very stony fine sandy to m and mall areas of Rock
<br />outcrop, Valto very stony ine ndy loam, Nordicol very
<br />stony sandy loam, and An ik am.
<br />Permeability of this Fo i gate soil is moderately
<br />slow. Effective rooting dep is 20 to 40 inches because
<br />of the presence of hard b d ck. Available water
<br />capacity is low. Runoff is a m, and the hazard of
<br />erosion is slight.
<br />This unit is used mai ly as w Bland and for livestock
<br />grazing and homesite evelopme t. It is also used for
<br />wildlife habitat.
<br />This unit is well ited to the pro uction of ponderosa
<br />pine. On the basi of a site index of 5, the potential
<br />production of m ketable timber per re is 4,025 cubic
<br />feet or 78,300 oard feet (Internationa rule) from an
<br />even-aged, fu stocked stand of trees 00 years old.
<br />The main ncerns in producing and rvesting timber
<br />are reforest lion and providing protection om erosion
<br />along road and in other areas where vege lion has
<br />been re ved. Harvesting may be restricted wring
<br />periods f heavy snowfall or rainfall or during owmelt.
<br />Refore tation should be carefully managed to reduce
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