HomeMy WebLinkAbout20010572.tiff SHEET NO. 43
SOIL SURVEY OF WELD COUNTY, COLORADO, NORTHERN PART
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38 Soil sui
of preferred species is maintained in the plant buffalograss. The average annual production of air-dr)
community. vegetation ranges from 500 to 1,500 pounds.
If the plant cover is disturbed, protection from erosion If the range is overgrazed, the proportion of prefers
is needed. Loss of the surface layer results in a severe forage plants decreases and the proportion of less
decrease in productivity and in the potential of the unit to preferred forage plants increases. Therefore, Iivestoci
produce plants suitable for grazing. Slope limits access grazing should be managed so that the desired balan
by livestock and results in overgrazing of the less sloping of preferred species is maintained in the plant
areas. community.
Management practices suitable for use on this unit are Range seeding is suitable if the range is in poor
proper range use, deferred grazing, and rotation grazing. condition. The plants selected for seeding should mei
Livestock grazing should be managed to protect the unit the seasonal requirements of livestock or wildlife, or
from excessive erosion. Mechanical treatment is not both. Other management practices that are suitable fc
practical because of the areas of Rock outcrop and the use on this unit are proper range use, deferred grazin
steepness of slope. and rotation grazing. If the plant cover is disturbed,
This unit is poorly suited to windbreaks and protection from soil blowing is needed. Loss of the
environmental plantings. The main limitations of the surface layer results in a severe decrease in product',
Peetz soil are the high content of lime, moderate and in the potential of the soil to produce plants suits
available water capacity, and steepness of slope. for grazing.
Supplemental irrigation may be needed when planting This unit is well suited to windbreaks and
and during dry periods. environmental plantings. Supplemental irrigation may
This map unit is in capability subclass Vlls, needed when planting and during dry periods.
nonirrigated, and in Gravel Breaks range site. This map unit is in capability subclass IV, nonirrigat
54—Platner loam, 0 to 3 percent slopes. This deep, and in Loamy Plains range site.
well drained soil is on smooth to slightly dissected plains 55—Renohill fine sandy loam, 0 to 6 percent
and adjacent stream terraces. It formed in calcareous slopes. This moderately deep, well drained soil is on
loamy alluvium. slightly dissected to moderately dissected plains. It
_ Typically, the surface layer is grayish brown loam 4 formed in calcareous loamy or clayey residuum deriv(
inches thick. The subsoil is clay, clay loam, and silty clay dominantly from shale.
loam 20 inches thick. The substratum to a depth of 60 Typically, the surface layer is brown fine sandy loaf
inches or more is calcareous fine sandy loam and sandy inches thick. The subsoil is clay loam 13 inches thick
loam. The substratum is calcareous clay loam 14 inches thi
Included in this unit are small areas of Ascalon fine Shale is at a depth of 32 inches. Depth to shale rang
sandy loam, Manzanola clay loam, and Nunn clay loam. from 20 to 40 inches. In some areas the surface laye
Also included are soils that have a fine sandy loam or loam or clay loam.
sandy loam surface layer. Included in this unit are small areas of Midway clay
Permeability of this Platner soil is slow. Available water loam, Shingle loam, and Rock outcrop of shale.
capacity is high. Effective rooting depth is 60 inches or g
more. Runoff is slow, and the hazard of water erosion is Permeability of this Renohill soil is slow. Available
slight. The hazard of soil blowing is moderate. water capacity is moderate. Effective rooting depth iE
This unit is used as nonirrigated cropland and to 40 inches. Runoff is medium, and the hazard of w,
rangeland. Winter wheat is the main crop. erosion is slight to moderate. The hazard of soil blow
This unit is well suited to winter wheat, barley, oats, is moderate.
and sorghum. Low annual precipitation is the main This unit is used as rangeland and nonirrigated
limitation for the crops that can be grown on this unit. cropland.
Because precipitation is not sufficient for annual The potential plant community on this unit is main!'
cropping, a cropping system that includes small grain blue grama, western wheatgrass, sedges, and
and summer fallow is most suitable..Precipitation usually buffalograss. The average annual production of air-di
is too low for crops on this unit to make efficient use of vegetation ranges from 500 to 1,500 pounds.
fertilizer. If the range is overgrazed, the proportion of prefer
Maintaining crop residue on or near the surface forage plants decreases and the proportion of less
reduces runoff, reduces soil blowing, and helps to preferred forage plants increases. Therefore, livestoc
maintain soil tilth and organic matter content. Stubble- grazing should be managed so that the desired !Dalai
mulch farming, striperopping, and minimum tillage help to of preferred species is maintained in the plant
control erosion and conserve moisture. Terraces reduce community.
runoff and the risk of erosion and help to conserve Range seeding is suitable if the range is in poor
-- moisture. condition. The plants selected for seeding should mE
The potential plant community on this unit is mainly the seasonal requirements of livestock or wildlife, or
blue grama, western wheatgrass, sedges, and both. Other management practices that are suitable
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