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64
<br />Soil Survey
<br />3.
<br />areas of soils that are similar to this Teflon soil but are
<br />better drained.
<br />Permeability of this Teflon soil is moderate or
<br />moderately slow. Effective rooting depth is 24 to 36
<br />inches because of the presence of a high water table.
<br />Available water capacity is high. Runoff is slow, and the
<br />hazard of erosion is moderate. This soil has a fluctuating
<br />water table in most places that rises to within 2 to 3 feet
<br />of the surtace during spring and summer. The soil is
<br />subject to flooding except where protected by building
<br />upstream dams or channeling by streams. Flooding
<br />commonly occurs during spring snowmelt or during the
<br />rainy season in fall.
<br />This unit is used mainly for irrigated cultivated crops
<br />and pasture and as rangeland. Alfalfa, barley, and oats
<br />are the main irrigated crops. The irrigated pasture is a
<br />mixture of alfalfa and introduced grasses.
<br />The main management concerns on irrigated pasture
<br />and cropland are controlling water erosion, maintaining
<br />the organic matter content and fertility of the surtace
<br />layer, and properly using irrigation water. On irrigated
<br />pasture, proper grazing use and planned grazing systems
<br />help to maintain the quality and quantity of grasses and
<br />legumes. Erosion can be controlled by maintaining a
<br />plant cover on the soil. Irrigation methods suited to this
<br />unit are corrugation, flooding, and sprinkler systems.
<br />Corrugation and sprinkler systems are suited to small
<br />grain, alfalfa, and pasture. Flood irrigation can also be
<br />used for pasture. Regardless of the irrigation method
<br />used, water should be applied at a rate slow enough to
<br />minimize erosion.
<br />The native vegetation on this unit is mainly tufted
<br />hairgrass, slender wheatgrass, redtop, Nebraska sedge,
<br />Baltic rush, cottonwood, bluejoint reedgrass, and willows.
<br />Proper grazing use as part of a planned grazing system
<br />helps to maintain the quality and quantity of the
<br />preferred rangeland vegetation. Seeding facilitates the
<br />revegetation of areas depleted by heavy grazing,
<br />cultivation, and, other disturbances. Developing livestock
<br />watering facilities and deferring grazing improve the
<br />distribution of grazing and help to maintain the condition
<br />of the rangeland.
<br />Wildlife such as mule deer, cottontail, muskrat,
<br />squirrel, and coyote and viatertowl and various other
<br />birds use this unit. They obtain their food and shelter
<br />from irrigated cropland and pasture and from native
<br />rangeland. Areas of rangeland, tall grasses in fence
<br />rows, and odd corners of fields can be managed to
<br />improve or to create wildlife habitat.
<br />The hazards of flooding and wetness because of the
<br />fluctuating water table are the main limitations for
<br />homesite and urban development. The construction of
<br />sanitary facilities poses a risk of polluting nearby water.
<br />Drainage and protection from flooding commonly are
<br />needed before any building construction is started.
<br />This map unit is in capability subclass Illw, irrigated
<br />and nonirrigated.
<br />67-Uinta loam, 5 to 15 percent slopes. This de p,
<br />II drained soil is on mountainsides and alluvial fa s. It
<br />fo ed in alluvium derived from interbedded red
<br />sa stone and shale. Elevation is 7,800 to 9,800 et.
<br />The verage annual precipitation is 20 to 28 inc s. The
<br />avers a annual air temperature is 35 to 40 deg es F,
<br />and th average frost-free period is 60 to 80 ys.
<br />Typic ly, the surtace is covered with a lay r of organic
<br />material inches thick. The surtace layer is eddish
<br />brown loo about 15 inches thick. The ne layer is
<br />reddish bro n sandy clay loam about 8 i hes thick. The
<br />upper part o the subsoil is reddish brow sandy clay
<br />loam about 9 ches thick, and the low part is red
<br />sandy clay loo about 13 inches thick The substratum
<br />is red loam that xtends to a depth of 60 inches or
<br />more. In some p ces the surtace lay r is fine sandy
<br />loam.
<br />Included in this it are about 5
<br />stony fine sandy to and small s
<br />stony fine sandy loo and Leadvil
<br />loam.
<br />Permeability of this in
<br />rooting depth is 60 inc
<br />capacity is high. Runoff 's
<br />erosion is moderate.
<br />This unit is used mainly
<br />grazing. It is also used foi
<br />This unit is well suited 1
<br />spruce. On the basis of a
<br />production of marketable
<br />feet or 31,200 board fee
<br />even-aged, fully stocke
<br />Other trees well suited o
<br />fir, subalpine fir, and a pe
<br />The main concerns in
<br />are reforestation an pro
<br />along roads and in ther
<br />been removed. Ha estin
<br />i soil
<br />or m
<br />~rcent Valto very
<br />as of Horsethief very
<br />very stony sandy
<br />moderate. Effective
<br />:. Available water
<br />~, and the hazard of
<br />as woodland and for livestock
<br />w dlife habitat.
<br />he production of Engelmann
<br />e index of 80, the potential
<br />i er per acre is 5,410 cubic
<br />(Int rnational rule) from an
<br />,tan of trees 100 years old.
<br />this it are white fir, Douglas-
<br />produci and harvesting timber
<br />viding pr tection from erosion
<br />areas w re vegetation has
<br />g may be estricted during
<br />periods when mu snow accumula es, during snowmelt,
<br />or during periods f heavy rainfall. forestation should
<br />be carefully ma ged to reduce com etition from
<br />undesirable un rstory plants. Plant c mpetition delays
<br />natural regene lion but does not prev nt the eventual
<br />development f a fully stocked normal and of trees.
<br />Planting nur ry stock facilitates refores lion.
<br />Among th trees that are suitable for p nting are
<br />Douglas-fir Engelmann spruce, and lodge ole pine.
<br />Proper de ign of road drainage systems a care in the
<br />placeme of culverts help to control erosio .Spoil from
<br />excavaf ns is subject to rill and gully erosio and to
<br />sloughi g. Roads and landings can be protec d from
<br />erosio by constructing diversions and by see g cuts
<br />and f' Is.
<br />T e native vegetation on this unit is mainly whi a fir,
<br />Do glas-fir, and Engelmann spruce. Other import t
<br />pl is that characterize this unit are aspen, subal ne fir,
<br />Ar ono fescue, mountain brome, elk sedge, wild r e,
<br />
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