PERMFILE56455

• Permit No: M2000118
• IBM Index Class Name: Permit File
• Doc Name: Permit Application Exhibits
• Section_Exhibit Name: Exhibits
• Media Type: D
• Archive: No

Ruedano County Area, Colorado
Irrigation water can be applied by corrugations and by
flooding from contour ditches. Leveling helps to insure
the uniform application of water.
Seedbed preparation should be on the contour or
across the slope where practical. Proper stocking rates,
pasture rotation, and restricted grazing during wet
periods help to keep the pasture in good condition and
to protect the soil Tram erosion. Nonleguminous crops
respond to nitrogen and phosphorus, and leguminous
crops respond to phosphorus. If properly managed, this
unit can produce 3.5 tons of irrigated alfalfa hay per
acre.
In areas of nonirrigated cropland, stones and cobbles
on the surface and conservation of moisture are
important concerns. Areas with a large amount of stones
and cobbles on the surface should be avoided. In other
areas, spring-loaded plows can be used for tillage.
Because precipitation is not sufficient for annual
cropping, a cropping system that includes small grain
and summer Iallow is most suitable. Crop residue left on
or near the surface Helps to conserve moisture, maintain
filth, and control erosion. Subsoiling increases the
effective rooting depth.
With good management, this unit can produce 17
bushels per acre of wheat grown in awheat-Tallow
cropping system.
If this unit is used for windbreaks and environmental
plantings, the main limitation is the stones and cobbles
on the surface. Supplemental irrigation may be needed
when planting and during dry periods. Among the trees
that are suitable for planting are Russian-olive and
ponderosa pine. Among the shrubs are lilac and
American plum.
The main limitation for homesite development is the
shrink-swell potential. The effects of shrinking and
swelling can be reduced by maintaining a constant
moisture content around the foundation. Backfilling with
material that has lour shrink-swell potential can also
reduce the effects of shrinking and swelling.
Septic tank absorption fields of conventional size do
not function adequately because of the slovr permeability
of the soil. Other kinds of sewage disposal systems may
be needed.
This map unit is in capability subclass IVe, irrigated
and noni«igated. It is in Loamy Foothills range site.
59-Nunn clay loam, 3 to 9 percent slopes. This
deep, yell drained soil is on terraces and fans. It formed
in alluvium. The native vegetation is mainly grass.
Elevation is 6,000 to 7,500 feet. The average annual
precipitation is 15 to 16 inches, the average annual air
temperature is 48 to 52 degrees F, and the average
frost-free period is 100 to 125 days.
Typically, the surface layer is grayish brown clay loam
5 inches thick. The upper 5 inches of the subsoil is clay
loam, and the tourer 23 inches is clay. The substratum to
a depth of 60 inches or more is clay loam. The soil is
neutral to a depth of 18 inches, moderately alkaline to a
depth of 40 inches, and neutral below that depth.
47
Included in this unit is about 10 percent Noden loam in
the steeper areas of the unit. Also included are
occasional small nests of stones and cobbles on the
surface.
Permeability of this Nunn soil is slow. Available water
capacity is high. Effective rooting depth is 60 inches or
more. Runoll is medium to rapid, and the hazard of
water erosion is moderate to very high.
tvlost areas of this unit are used as rangeland. A few
areas are used for irrigated hay and pasture.
The potential plant community on this unit is mainly
western wheatgrass, blue grama, and big bluestem.
Other grasses that characterize the unit are prairie
junegrass, needleandthread, and sideoats grama. The
average annual production of air-dry vegetation is about
1,200 pounds per acre. If the condition of the range
deteriorates, blue grama, snakeweed, threeawn, and
pricklypear increase. Range seeding is suitable it the
range is in poor condition.
This unit is well suited to irrigated hay and pasture.
Irrigation water can be applied by corrugations and by
flooding from contour ditches. For the efficient
application and removal of irrigation water, leveling is
needed. Water needs to be applied at a slow rate over a
long period to insure that the root zone is properly
wetted.
Seedbed preparation should be on the contour or
across the slope where practical. Proper grazing
practices, weed control, and fertilizer are needed to
insure maximum quality of forage. If properly managed,
this unit can produce 3.5 tons of irrigated alfalfa hay per
acre.
This unit is well suited to windbreaks and
environmental plantings. Supplemental irrigation may be
needed when planting and during dry periods. Among
the trees that are suitable for planting are Russian-olive
and ponderosa pine. Among the shrubs are lilac and
American plum.
If this unit is used for homesite development, the main
limitation is the shrink-swell potential. The effects of
shrinking and swelling can be reduced by maintaining a
constant moisture content around the foundation.
Backfilling with material that has low shrink-swell
potential can also reduce the effects of shrinking and
swelling.
Septic tank absorption fields of conventional size do
not function adequately because of the slow permeability
of the soil. Other kinds of sewage disposal systems may
be needed.
This map unit is in capability subclass IVe, i«igated
and nonirrigated. It is in Loamy Foothills range site.
60-Olney sandy loam, 3 to 12 percent slopes. This
deep, yell drained soil is on uplands. It formed in
calcareous eolian material. The native vegetation is
mainly grass. Elevation is 5,500 to 6,900 feet. The
average annual precipitation is 13 to 15 inches, the
average annual air temperature is 49 to 54 degrees F,
and the average frost-free period is 125 to 160 days.