HomeMy WebLinkAbout20001432.tiff 32 SOIL SURVEY
•e Rocky Mountain juniper, eastern redcedar, ponderosa ble years to 1,800 pounds in unfavorable years. As range
pine, Siberian elm, Russian-olive, and hackberry. The condition deteriorates, the sand bluestem, sand reedgrass,
shrubs best suited are skunkbush sumac, lilac, and Siberi- and switchgrass decrease and blue grama, sand dropseed,
an peashrub. and sand sage increase. Annual weeds and grasses invade
Wildlife is an important secondary use of this soil. The the site as range condition becomes poorer.
cropland areas provide favorable habitat for ring-necked Management of vegetation on this soil should be based trtrl'
pheasant and mourning dove. Many nongame species can on taking half and leaving half of the total annual produc- K,
be attracted by establishing areas for nesting and escape tion. Seeding is desirable if the range is in poor condition.
cover. For pheasants, undisturbed nesting cover is essen- Sand bluestem, sand reedgrass, switchgrass, sideoats air
tial and should be included in plans for habitat develop- grama, blue grama, and pubescent wheatgrass are suita- i
ment, especially in areas of intensive agriculture. ble for seeding. The grass selected should meet the
Rapid expansion of Greeley and the surrounding area seasonal requirements of livestock. It can be seeded into 6l
has resulted in urbanization of much of this Olney soil. a clean, firm sorghum stubble, or it can be drilled into a 1
This soil has good potential for urban and recreational firm prepared seedbed. Seeding early in spring has '
development. The only limiting feature is the moderately proven most successful.
rapid permeability in the substratum, which causes a Windbreaks and environmental plantings are generally
hazard of ground water contamination from sewage suited to this soil. Soil blowing, the principal hazard in
lagoons. Lawns, shrubs, and trees grow well. Capability establishing trees and shrubs, can be controlled by cul-
class I irrigated. tivating only in the tree row and by leaving a strip of It
47—Olney fine sandy loam, 1 to 3 percent slopes. vegetation between the rows. Supplemental irrigation
This is a deep, well drained soil on plains at elevations of may be needed at the time of planting and during dry
4,600 to 5,200 feet. It formed in mixed outwash deposits. periods. Trees that are best suited and have good survival
Included in mapping are small areas of soils that have a are Rocky Mountain juniper, eastern redcedar, ponderosa /'.
dark surface layer. Some small leveled areas are also in- pine, Siberian elm, Russian-olive, and hackberry. The !
eluded. shrubs best suited are skunkbush sumac, lilac, and Siberi- i
Typically the surface layer of this Olney soil is grayish an peashrub. �.:.
brown fine sandy loam about 10 inches thick. The subsoil Wildlife is an important secondary use of this soil. The
—is yellowish brown and very pale brown sandy clay loam cropland areas provide favorable habitat for ring-necked f!.
ibout 14 inches thick. The substratum to a depth of 60 pheasant and mourning dove. Many nongame species can
inches is very pale brown, calcareous fine sandy loam. be attracted by establishing areas for nesting and escape
Permeability and available water capacity are cover. For pheasants, undisturbed nesting cover is essen-
moderate. The effective rooting depth is 60 inches or tial and should be included in plans for habitat develop-
more. Surface runoff is medium, and the erosion hazard is ment, especially in areas of intensive agriculture. Range-
low. land wildlife, for example, the pronghorn antelope, can be
In irrigated areas this soil is suited to all crops com- attracted by developing livestock watering facilities,
monly grown in the area, including corn, sugar beets, managing livestock grazing, and reseeding where needed.
beans, alfalfa, small grain, potatoes, and onions. An exam- Rapid expansion of Greeley and the surrounding area
ple of a suitable cropping system is 3 to 4 years of alfalfa has resulted in urbanization of much of the Olney soil. '
followed by corn, corn for silage, sugar beets, small grain, This soil has good potential for urban and recreational 1
or beans. Land leveling, ditch lining, and installing development. The only limiting feature is the moderately �:
pipelines may be needed for proper water application. All rapid permeability in the substratum, which causes a
methods of irrigation are suitable, but furrow irrigation is hazard of ground water contamination from sewage r
the most common. Barnyard manure and commercial fer- lagoons. Lawns, shrubs, and trees grow well. Capability
tilizer are needed for top yields. subclass Ile irrigated, IVe nonirrigated; Sandy Plains
In nonirrigated areas this soil is suited to winter wheat, range site. I.
barley, and sorghum. Most of the acreage is planted to 48—Olney fine sandy loam, 3 to 5 percent slopes.
winter wheat. The predicted average yield is 28 bushels This is a deep, well drained soil on plains at elevations of
per acre. The soil is summer fallowed in alternate years 4,600 to 5,200 feet. It formed in mixed outwash deposits.
to allow moisture accumulation. Generally precipitation is Included in mapping are small areas of soils that have a
too low for beneficial use of fertilizer. dark surface layer and small areas of soils that have
Stubble mulch farming, striperopping, and minimum til- sandstone and shale within a depth of 60 inches.
lage are needed to control soil blowing and water erosion. Typically the surface layer of this Olney soil is grayish
Terracing also may be needed to control water erosion. brown fine sandy clay loam about 8 inches thick. The sub-
The potential native vegetation on this range site is soil is yellowish brown and very pale brown fine sandy
dominated by sand bluestem, sand reedgrass, and blue loam about 12 inches thick. The substratum to a depth of
— grama. Needleandthread, switchgrass, sideoats grama, 60 inches is very pale brown, calcareous fine sandy loam.
and western wheatgrass are also prominent. Potential Permeability and available water capacity are
production ranges from 2,200 pounds per acre in favora- moderate. The effective rooting depth is 60 inches or
EXHIBIT
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WELD COUNTY, COLORADO, SOUTHERN PART .NO3
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