|
~L FASO COUNTY' AREA, COLORADO •
<br />may be needed to insure survival. Trees that are best
<br />°ted and hate good survival are Rocky Mountain ju-
<br />ar, eastern redcerlar, ponderosa pine, and Siberian elm,
<br />,,,hubs that are best suited are skunkbush sumac and
<br />lilac
<br />These soils are poorly suited [o wildlife habitat. They
<br />are typically used as habitat for rangeland wildlife, such
<br />as scaled quail and antelope. Livestock grazing must be
<br />very carefully managed if wildlife is to satisfy most of its
<br />habitat requirements.
<br />The main limitation for construction on the Schamber
<br />soil is steep slopes. Because of rapid petmteability, [here
<br />is a hazard of pollution if this soil is used fm' septic tank
<br />absorption fields. The high content of coarse fragments
<br />may cause problems tci[h excavations, mainly because cut
<br />banks cave in. Special designs fm• buildings and roads are
<br />necessary to offset the limitation of slope. The P.azor soil
<br />is limited by depth to shale, slow permeabilit}', limited
<br />ability to support a load, shrink-swell potential, and slope.
<br />Both soils are limited by fl'ost-action potential. Special
<br />designs for buildings and roads are needed to overcome
<br />these limitations. Capability subclass Vlle.
<br />S3-Stapleton sand}' loam, 3 to S percent slopes. This
<br />deep, noncalcareous, well cb•ained soil formed in sandy al-
<br />luvium derived from arkosic bedrock on uplands. Eleva-
<br />tion ranges from G,500 to 7,300 feet. The average annual
<br />precipitation is about 15 inches, the average annual air
<br />temperatm'e is about 47 degt'ees F, and the average fl•ost•
<br />free period is about 135 days.
<br />Typically, the sut•face layer is grayish brown sandy
<br />.m about 11 inches thick. The subsoil is grayish bt'ott•n
<br />~,avelly sandy loam about G inches thick. The substratum
<br />extends to a depth of GO inches m• mm•e. I[ is pale brown
<br />gravelly sandy loam in the upper part and grades to
<br />gravelly loamy sand in the louver part.
<br />Included with this soil in mapping m'e small areas of
<br />Louviers silty clay loam, 3 to 1S percent slopes; Blakeland
<br />loamy sand, 1 to ~ percent slopes; Columbine gravelly
<br />z:mdy loam, 0 [0 3 percent slopes; and Fluvaquentic
<br />Haplaquolls, nearly level. Also included are areas where
<br />arkose beds oC sandstone and shale are at a depth of 0 to
<br />4U inches. Included areas make up about 20 percent of the
<br />mapped acreage.
<br />1'ermeabil ity of this Stapleton soil is rapid. Effective
<br />rooting depth is GO inches m' more. Available water
<br />capacity is moderate. Sw'face runoff is sloe, and the
<br />huz:n•ds of erosion and soil blowing are moderate.
<br />'1'hi. soil is used as rangeland, for wildlife habitat, and
<br />us hnnu>ites.
<br />Natit'e vegetation is mainly western tcheatgrass, side-
<br />n:ds gramu, needleand[hread, and little bluestem. The
<br />prcrluminant shrub on this soil is true mountainmahogany.
<br />1'uc•c:r occw•s in some areas.
<br />Ilcl'crred grazing late in summer and in fall improves
<br />lh+• condition of the range. Properly- locating livestock
<br />n;rtcr•ing Grcilities helps to control grazing.
<br />Rtinrlbrcaks and environmental plantings are generally
<br />~vitcd [o Chi, soil. Soil blowing is the principal limitation
<br />53
<br />Cor the establishment of trees and shrubs. This limitation
<br />can be overcome by cultivating only in [he tree rows and
<br />leaving a sG'ip of vegetation between the rotes. Supple-
<br />mental irrigation may be needed tchen planting and dur-
<br />ing ch'y periods. Trees [hat are best suited and have good
<br />survival are P.ockv Afountain juniper, eastern redcerlar,
<br />ponderosa pine, Siberian elm, Russian-olive, and hackber-
<br />ry. Shrubs that are best suited are skunkbush sumac,
<br />lilac, and Siberian peashrub.
<br />This soil is suited (o habitat for openland and rangeland
<br />wildlife. I:angeland wildlife, such as prongha'n antelope,
<br />can be encouraged by developing livestock watering facili-
<br />ties, properly managing livestock grazing, and reseeding
<br />range where needed.
<br />The main limitation of this soil fm• w•ban use is frost-
<br />action potential. Special design of roads and streets is
<br />necessary to minimize frost heave damage. Special prac-
<br />tices must be provided to minimize water erosion and soil
<br />blowing on construction sites where vegetation has been
<br />removed. Access roads must have adequate cut-slope
<br />grade and be provided with drains to control sw•face ru-
<br />noff. Capability subclass IVe.
<br />S4-Stapleton sandy loam, S to 15 percent slopes.
<br />This deep, noncalcareous, well drained soil formed in
<br />sandy alluvium derived from arkosic bedrock on uplands.
<br />Elevation t'anges from G,500 to 7,300 feet. The average
<br />annual precipitation is about 15 inches, the average an-
<br />nual air temperature is about 47 degrees F, and the
<br />average ft'ost-tree period is about 135 clays.
<br />Typically, [he surface layer is grayish brown sandy
<br />loam about I1 inches thick. The subsoil is grayish brown
<br />gravelly sandy loam about 6 inches thick. The substratum
<br />extends to a depth of GO inches or more. IC is pace brown
<br />gravelly sandy loam in the upper part and grades to
<br />gravelly loamy sand in the lower part.
<br />Included with this soil in mapping are small at•eas of
<br />Bresser sandy loam, 5 to 9 percent slopes; Louviers silty
<br />clay loam, 3 to IS percent slopes; 'fruckton sandy loam, 3
<br />to 0 percent slopes; 1"oiler gravelly sandy loam, 1 to S
<br />percent slopes; and small outcrops of arkose beds of sand-
<br />stone and shale.
<br />Permeability of this Stapleton soil is rapid. Effective
<br />rooting depth is GO inches or mm'e. Available water
<br />capacity is moderate. Sm-face runoff is medium, and the
<br />hazard of erosion is moderate.
<br />This soil is used as range, for wildlife habitat, and as
<br />homesites.
<br />native vegetation is mainly western a'heatgr•ass, side-
<br />oa[s grama, n@edleandth read, and little bluestem. The
<br />dominant shrub on this soil is true mountainmahogany.
<br />1"ucca is present in some places.
<br />Deferred grazing late in summer and early in fall im-
<br />proves the condition of the range. Properly locating
<br />livestock watering facilities helps to control gt'azing.
<br />Windbreaks and environmental plantings generally are
<br />suited to this soil. Soil blowing is the main limitation for
<br />the establishment of u•ees and shrvbs.'fhis limitation can
<br />be overcome by cultivating only in the tree rows and
<br />
|