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<br />crass are suitable for seeding. Preparing a seedbed and
<br />~ing ihn seed are good practires
<br />1,my rlcr•r amt snmr• cohunl;ul rabLil. syuurcl, un;i
<br />rouse hnd hahdnl [~n Ihi~. suit.
<br />Cnrnnniroly dcvoluprncnt and recreatiun an. Iimacd by
<br />~derately steep slopes, shrink-swell potential. and low
<br />ngth.
<br />This complex is in capability subclass Vle, nor,ur~gated.
<br />~38
<br />2-Wann sandy loam, t to 3 percent slopes. This
<br />p, somewhat poorly drained. nF;rr,y level to gently
<br />IOping. low-lying soil is on terraces and bottom land in
<br />eys- Elevation ranges from 5.000 to 6,SOG feel. The
<br />formed in alluvium denved pnmanly from sandstone
<br />nd shale. The average annual precip~tat~on is about 12
<br />mss, the average annual air temperature is about QN
<br />roes F, and the average frost-free p-nod ~s about
<br />days.
<br />Typically, the upper pan of the surface layer is dark
<br />fish brown sandy loam about B inches thick, and the
<br />~r part is dark grayish brown fine sandy loam about a
<br />t es thick. The upper part of the underlying matenal is
<br />tottled, light brownish gray fine sandv loam and sang'
<br />>•n about 24 inches thick, and the lower part ~s mo[I
<br />brownish gray coarse sandy loam to a depth of (iU
<br />fiches.
<br />~cluded with this soil in mapping are small areas of
<br />and Arvada soils and Torrifluvents. These sods have
<br />es of 1 to 3 percent. These areas make up 5 to 18
<br />ercent of the map unit.
<br />~rmeability is moderately rapid, and available water
<br />city is high. Effective rooting depth varies with the
<br />vet of the water table but is usually about 2 feet.
<br />urface runoff is slow, and the erosion hazard is moeer-
<br />Depth to the water table ranges from 2 to 3 feel.
<br />level o` the water table varies with the ~mounl of
<br />igation water applied to this soil and surrounding soils.
<br />r ponds in spring. This soil is occasionally flooded
<br />nef penods between April and July.
<br />rs soiV is used mainly for grazing, grass or legume
<br />3y, and pasture.
<br />e drains and improved water management increas•?
<br />potential (or crops. This soil is usually irrigated by
<br />mows or flooding. Sprinklers are also well suited.
<br />e native vegetation on this soil is mainly alkali saca-
<br />saltgrass, wheatgrass, sedges, and rabbdbrush.
<br />hen range condltion deteriorates. shrugs and sall-
<br />ass increase. When the range is m poor condolion.
<br />suable weeds and annual pl; nts ar~~ abundant.
<br />edy managing grazng maintains and ~mprov<s
<br />e condition. Alkali sacaton and western v;heate•a
<br />e Suitable for seeding. Prepannq a seedbed ono dnlm~ _
<br />~eed are good prac6ccs. Controll~nq brush improves
<br />e [hat rs producing more woody slvubs than is nor-
<br />311y found in the potential plant community, but care
<br />~Id be taken to leave stands of fourwing saltbush.
<br />Mourning dove, ground squirrel, cottontail rabbit, and
<br />some pheasant find habitat on this soil
<br />Gommundy dcvvlopment is hnntcd by a hiyh water
<br />table, seasonal Ilood~ng, seepage, and frost heawng.
<br />Dramayc increases polr:nhal lOr v;uious uses.
<br />This soil is in capab~l~ty subclasses IVw, irrigated, and
<br />Vlw, nonirrigated.
<br />Use and management of the soils
<br />The soil survey is a detailed inventory and evaluation
<br />of the most basic resource of the survey area-the soil.
<br />It is useful in adlusling land use, including urbanization.
<br />to the limitations and potentials of natural resources and
<br />the environment. Also, it can help avoid soil-related fail-
<br />ures muses of the land.
<br />While a soil survey is in progress, soil scientists, con-
<br />servationists, engineers, and others keep extensive
<br />notes about the nature of the soils and about unique
<br />aspects of behavior of the soils. These notes include
<br />data on erosion, drought damage to specific crops, yield
<br />estimates, flooding, the functioning of septic tank dispos-
<br />'f SySter^.S, and C:hCr to CtOfs SticC.ing the pfUduClivily,
<br />--potential, and limitations of the soils under various uses
<br />and management. In this way, field experience and
<br />measured data on soil properties and performance are
<br />used as a basis for predicting soil behavior.
<br />Information in this section is useful in planning use and
<br />management of sods for crops and pasture, rangeland,
<br />and woodland, as sites for bwldings, highways and other
<br />transportation systems, sanitary facilities, and parks and
<br />other recreation facilities, and for wildlife habitat. From
<br />the data presented, the potential of each soil for speci-
<br />fied land uses can be determined, soil limitations to
<br />these land uses can be identified, and costly failures in
<br />houses and other structures, caused by unfavorable soil
<br />propenies, can be avoided. A site where soil propenies
<br />are favorable can be selected. or practices that will over-
<br />come the soil limitations can bo planned
<br />Planners and others using ;he soil survey can evaluate
<br />the impact of specific land uses on the overall productiv-
<br />ity of the survey area or other broad planning area and
<br />on the environment. Productivity and the environment
<br />are closely related to the nature of the soil. Plans should
<br />maintain or create gland-use pattern in harmony with
<br />the natural soil.
<br />Contractors can find information that is useful in locat-
<br />ing sources of sand and gravel, roadl~ll, and topsoil.
<br />Other information indicates the presence of bedrock,
<br />~+e[ness, or very firm soil horizons that cause difficulty in
<br />:cavation.
<br />" Health officials, highway officials. engineers, and many
<br />other specialists also can tend useful information in this
<br />soil survey. The sate disposal of wastes, for example, is
<br />closely related to properties of the soil. Pavements,
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