HomeMy WebLinkAbout20060873.tiff soil survey of
Weld County, Colorado
Northern Part
United States Department of Agriculture
Soil Conservation Service and Forest Service
in cooperation with
Colorado Agricultural Experiment Station
2006-0873
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20 Soil survey
The potential plant community on this unit is mainly dark grayish brown loam 10 inches thick. The upper 15
blue grama, needleandthread, and prairie sandreed. The inches of the underlying material is very channery sandy
average annual production of air-dry vegetation ranges loam,
, the next lower part t17o inches
depth cheiso Oan channery
ys or sandy lo is very
and
from 600 to 1,700 pounds. the
If the range is overgrazed, the proportion of preferred channery loamy sand. The soil is calcareous throughout.
forage plants decreases and the proportion of less Permeability of the Curabith soil is moderate. Available
preferred forage plants increases. Therefore, livestock water capacity is moderate. Effective rooting depth is 60
grazing should be managed so that the desired balance inches or more. Runoff is slow, and the hazard of water
of preferred species is maintained in the plant erosion is slight to very high.The hazard of soil blowing
community. is slight.
Range seeding is suitable if the range is in poor The Canyon soil is shallow and well drained. It formed
. condition. The plants selected for seeding should meet in calcareous loamy residuum derived from sandstone.
the seasonal requirements of livestock or wildlife, or Typically, the surface layer is dark grayish brown gravelly
both. Other management practices that are suitable for loam 3 inches thick. Below this is gravelly loam 11
use on this unit are proper range use, deferred grazing, inches thick. Sandstone is at a depth of 14 inches.
and rotation grazing. If the plant cover is disturbed, Depth to sandstone ranges from 10 to 20 inches. The
protection from erosion is needed. Loss of the surface soil is calcareous throughout.
layer results in a severe decrease in productivity and in Permeability of the Canyon soil is moderate. Available
the potential of the soil to produce plants suitable for water capacity is low. Effective rooting depth is 10 to 20
inches. Runoff is slow, and the hazard of water erosion
This unit is well suited to windbreaks and
gr is moderate to high. The hazard of soil blowing is slight.
environmental plantings. Soil blowing can be reduced by This unit is used as rangeland.
cultivating only in the tree rows and by leaving a strip of The potential plant community on the Bushman soil is
vegetation between the rows. Supplemental irrigation mainly blue grama, western wheatgrass,
may be needed when planting and during dry periods. needleandthread, and little bluestem. The average
This map unit is in capability subclass Vle, annual production of air-dry vegetation ranges from 700
— nonirrigated, and in Sandy Plains range site. to 1,800 pounds. The potential plant community on the
Curabith and Canyon soils is mainly blue grama, little
19—Bushman-Curablth-Canyon complex, 0 to.20 bluestem, sideoats grama, and sedges. The average
percent slopes. This map unit is on upland ridges, annual production of air-dry vegetation ranges from 500
breaks, and knolls. to 1,200 pounds on the Curabith soil and from 400 to
This unit is 45 percent Bushman fine sandy loam, 30 1,000 pounds on the Canyon soil.
percent Curabith loam, and 20 percent Canyon gravelly If the range is overgrazed,the proportion of preferred
loam. The Bushman soil is on backslopes and foot forage plants decreases and the proportion of less
slopes of,upland ridges. The Curabith and Canyon soils preferred forage plants increases. Therefore, livestock
are on shoulders of upland ridges and on breaks and grazing should be managed so that the desired balance
knolls. Slopes are moderately dissected and convex on of preferred species is maintained in the plant
the shoulders and are slightly dissected to moderately community.
dissected and concave on the backslopes and foot Management practices that are suitable for use on this
slopes. The individual components of this unit are in unit are proper range use, deferred grazing, and rotation
areas so narrow that it was not practical to map them grazing. If the plant cover is disturbed, protection from
separately at the scale used. erosion is needed. Loss of the surface layer results in a
Included in this unit are small areas of Ascalon fine severe decrease in productivity and in the potential of
sandy loam on backslopes and foot slopes of upland the unit to produce plants suitable for grazing.
ridges and Nunn and Haverson loams in small This unit is poorly suited to windbreaks and
drainageways dissecting upland ridges. Also included are environmental planting.
some areas of Rock outcrop. Included areas make up This map unit is in capability subclass Vls,
about 5 percent of the total acreage. nonirrigated. The Bushman soil is in Sandy Plains range
The.Bushman soil is deep and well drained. It formed site, and the Curabith and Canyon soils are in Limestone
in calcareous loamy alluvium. Typically, the surface layer Breaks range site.
is brown fine sandy loam 6 inches thick. Below this to a
depth of 60 inches or more is calcareous sandy loam. 20—Cascajo gravelly sandy loam, 5 to 20 percent
Permeability of the Bushman soil is moderate. slopes.This deep, excessively drained soil is on
Available water capacity is moderate. Effective rooting backslopes and shoulders of moderately dissected to
depth is 60 inches or more. Runoff is medium, and the highly dissected upland ridges and breaks. It formed in
hazard of water erosion is slight to high. The hazard of calcareous gravelly alluvium. Slopes are concave. Areas
soil blowing is moderate. are long and narrow and are 20 to 1,000 acres.
The Curabith soil is deep and well drained. It formed in Typically, 15 to 35 percent of the surface is covered
calcareous loamy alluvium. Typically, the surface layer is with gravel and cobbles.The surface layer is dark
21
Weld County, Colorado, Northern Part
grayish brown gravelly sandy loam 3 inches thick. The formed in calcareous loamy residuum derived from
next layer is calcareous very gravelly loamy coarse sand interbedded d the surfae ce eandes sle.
brown fine sandy loam 6
21 inches tc slve thir to a avell loamy of 60 inches coarse sands inches thick. The upper 4 inches of the subsoil is fine
more is calcareousthis unit
gravelly y sandy loam, and the lower 11 inches is clay loam. The
Included in this are small areas of soils, o substratum is calcareous clay loam 8 inches thick.
breaks,bk that have
fine-grained and sandstone n f upland ridges and
ept that to ichs; o outcrop or shoulders ude at a depth of 29 inches. Depth too sandstone and shalstone and shale e
and a
depth of 20 40 inches; Rock on
and crests of upland ridges and breaks; and Otero sandy ranges l from
in this 40
tinre small areas of clay
loam and Stoneham fine sandy loam on the lower parts loam, Red in fine sandy e small and Shingle Midway ay loam.
Iofncluded
backsloPes and upland ridges y and e t breaks. Also included are some areas of Rock outcrop.
bed areas make up ari 25 percent f the total Permeability of this Cushman soil is moderate.
acreage.The percentage varies from one area to Available water capacity is moderate. Effective rooting
anperm.
Permeability of this Cascajo soil is moderately rapid to depth is 20 to 40 inches. Runoff is medium, and the
wa errtcapacity is moderate. Effective trootingtdepth its 60 hazard of soil blowing s'slight.ht to moderate. The
This unit is used as rangeland and nonirrigated
inches or romore. Runoff t ry and the hazard of cropland. Winter wheat is the main crop.
water erosion is moderate to very high. The hazard of The potential plant community on this unit is mainly
soil blowing stareas is slight.
Most of this a unit o are e used gra as rangeland. A few bluffalog ass. The average annual nual prrass, oduction of air-dry
es, and
areas are used as a source of gravel. vegetation ranges from 500 to 1,500 pounds.
The potential plant community this unit is mainly If the range is overgrazed, the proportion of preferred
blue grama, little average an, sideoats aproduction
gtion and prairie forage plants decreases and the proportion of less
vegetation The annual production of s air-dry preferred forage plants increases. Therefore, livestock
vegetation range a overgrazed,from 500 the proportion200 pounds. grazing should be managed so that the desired balance
If gee is of preferred f preferred species is maintained in the plant
forage plants decreases and the proportion of less comunity.
preferred forage plants increases. Therefore, livestock Range seeding is suitable if the is in poor
grazing should be managed so that the desired balance condition. Teeisplants suitablselecte
for seeding range should meet
of preferred species is maintained in the plant the seasonal requirements of livestock or wildlife, or
community.
Areas that are by proper infested withundesirable
na a meat. plants use on this unit are proper range use, deferredtable for
grrazing,
can be improved nt grazing management. plant cover is
ed,
Management practices that are suitablegrazing,
for use on this and
fromerosiont is e needed. Loss of the surface
are proper use, deferred grazing, and rotasr protection
thegrazing.to Mechanical thetreatment is not of slope because of theepotential in
the soil to producen plantsu suitable for and in
the stony surface and steepness of slope. If the razin
plant cover is disturbed, protection from erosion is grazing.
Thisunit is suited to winter barley, and
needed. Loss of the surface layer results in a severe sorghum. Because to waiter wheat,is ey, oats,
decrease in productivity and in thepotential of the soil in so g uual c. Because
a cropping systemnot that sufficient cen for small
this unit to produce plants suitable for grazing. Slope
limits access by livestock and results in overgrazing of grain and summer fallow is most suitable. Precipitation
usually is too low for crops on this unit to make efficient
the less sloping areas. use of fertilizer.
This unit is 1poorlylant suited. windbreaks and Maintaining-crop residue on or near the surface
environmental ionngs. The ram aerate available
are the reduces erosion and helps to maintain soil tilth and
wage accumulationspacty. Supplemental of Time and moderate be nee or anic matter content. Stubble-mulch farming,
wh planting p y. during dryirrigation may be needed 9
Summer fallow, striperopping, and minimum tillage help to control erosion
when cultivation r and duringdry periods. and conserve moisture. Terraces reduce runoff and the
for weedinsure n t selection lishm and of dapted risk of erosion and help to conserve moisture.
plants e are needed to establishment survival This unit is well suited to windbreaks and
of seedlings. environmental plantings. The main limitations are the
This map unit is in Gravel ave capability subclass siteIls, moderate available water capacity and restricted rooting
nonirrigated, and in Breaks range site. depth. Supplemental irrigation may be needed when
21—Cushman fine sandy loam, 0 to 6 percent planting and during dry periods.
slopes.This moderately deep, well drained soil is on This map unit is in capability subclass IVe,
slightly dissected to moderately dissected plains. It nonirrigated, and in Loamy Plains range site.
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