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<br />SOIL SURVEY
<br />This soil has only fair potential for urban and re<
<br />tional development. Above the sand and gravel
<br />stratum the sail has moderate to high shrink swell,
<br />strength, and moderately slow permeability. These
<br />tares create problems in dwelling and road construe
<br />Excessive permeability in the substratum can cause
<br />lamination of the ground water supply from septic
<br />leach fields. Sewage lagoons! need to be lined. Capat
<br />22-Dacono clay loam, 1 to 3 percent slopes. This is a
<br />deep, welt drained soil on terraces. at elevations of 4,550
<br />to 4,970 feet. It formed in mixed alluvium. Included in
<br />mapping aze small, long and narrow areas of sand and
<br />gravel deposits and some small leveled areas.
<br />Typically the surface layer of this Dacono soil is gray-
<br />ish brown clay loam about. 12 inches thick The subsoff is
<br />grayish brown clay loam about 15 inches thick. The sub-
<br />stratum is very gravelly sand.
<br />Permeability is moderately slow:.Available water
<br />capacity is moderate. The effective rooting depth is 20 to
<br />40 inches. Surface runoff is medium, and the erosion
<br />hazard is low.
<br />In imgated areas this soil is suited to all crops ebm-
<br />monly grown in the area, including corn, sugar beets,
<br />beans, alfalfa, small grain, potatoes, and onions. An exam-
<br />ple of a suitable cropping system is 3 to 4 years of alfalfa
<br />followed by corn, corn for silage, sugaz beets, small grain,
<br />or beans. Generally, such characteristics as a high clay
<br />content or a rapidly permeable substratum slightly
<br />restrict some crops.
<br />All methods of irrigation aze suitable, but furrow ir-
<br />rigation is the most common. Proper irrigation water
<br />management is essential- Barnyazd manure and eommer-
<br />cial fertilizer aze needed for top yields.
<br />In nonirrigated azeas most of the acreage is in small
<br />grain and is summer followed in alternate years. Winter
<br />wheat is the principal crop. The predicted average yield is
<br />33 bushels per acre. If the crop is winterkilled; spring
<br />wheat can be'seeded_ Generally preeipitation.is too low
<br />for beneficial use of fertilizer.. - _,
<br />Stubble mulch farming, stripcropping, and minimum til-
<br />lage are needed to control soil blowing and water erosion.
<br />The potential native vegetation is dominated by
<br />western. wheatgrass, and blue grams. Buffalograss is also
<br />present Potential production ranges from 1,000 pounds
<br />per acre in favorable years to 600 pounds in unfavorable
<br />years. As range condition deteriorates, a blue grams-buf-
<br />falograss sod forms. Undesirable weeds and annuals in-
<br />vade the site as range condition becomes poorer.
<br />Management of vegetation on this soil should be based
<br />on taking half and leaving half of the total annual produe-
<br />tionrRauge pitting can help in reducing runoff. Seeding is
<br />desirable if the range is. in poor condition. Western
<br />wheatgrass, blue grams, sideoats grams, buffalograss;~pu-
<br />bescent wheatgrass, and crested wheatgrass are suitable
<br />for seeding. The grass selected should meet the seasonal
<br />requirements of livestock. It can be seeded into.a clean,
<br />fu7n sorghum stubble or it can be drilled. into a firm
<br />prepazed seedbed. Seeding early in spring has proven
<br />most successful.
<br />Windbreaks and environmental plantings of trees and
<br />shrubs commonly grown in the area are generally well
<br />suited "to this soil Cultivation to control competing
<br />vegetation should be continued for as many years as
<br />possible following planting. Trees that aze Best suited and
<br />have good survival are Rocky Mountain juniper, eastern
<br />. redcedaz, ponderosa pine; Siberian elm, Russian-olive, and
<br />}iaekberry. The shrubs best suited are slumkbush sumac,
<br />lilac, Siberian peastuvb, and American plum.
<br />Openland ,wildlife, such as pheasant, mourning dove,
<br />and cottontail, are best suited to this soil. Wildlife habitat
<br />development, including tree and shrub plantings and
<br />grass plantings to serve as nesting areas, should be suc-
<br />cessful without irrigation during most years. Under ir-
<br />rigation, good wildlife habitat can established, benefiting
<br />many kinds of openland wildlife. Rangeland. wildlife, for
<br />example, ,the pronghorn antelope, can be attracted by
<br />developing livestock watering facilities, managing
<br />livestock grazing, and reseeding where needed.
<br />This soil has only fair potential for urban and recrea-
<br />tional development. Above the sand and gravel. sub-
<br />stratum the soil has a moderate to high shrink-swell
<br />-potential, low strength, and moderately slow permeability.
<br />These features create problems in dwelling and road con-
<br />struction Excessive permeability in. the substratum can
<br />cause contamination of the ground water supply from
<br />septic tank leach fields. Sewage lagoons need to be lined.
<br />Capability subclass IIe imgated, IIIc nonimgated;
<br />Clayey PIains range site.
<br />23-Fort Collins loam, 0 to 1 percent slopes. This is a
<br />deep, well drained soil on terraces and smooth plains at
<br />elevations of 4,500 to 5,050 feet. It formed in alluvium.,
<br />modified by thin eolian deposits. Included_in mapping are
<br />some small leveled areas and few small areas of a soil
<br />that is calcareous at the surface.
<br />Typically. the surface layer of this Fort Collins soil is
<br />grayish brown loam about 10 inches thick. The subsoil is
<br />brown and very pale brown clay loam and loam about 20
<br />inches thick. The -substratum to a depth of_ 60 inches is
<br />fine sandy loam.
<br />Permeability is moderate.' Available water capacity is
<br />high.. The effective rooting depth is 60 inches or more.
<br />Surface runoff is slow, and the erosion hazard is low.
<br />This soil is used almost entirely for irrigated crops. It
<br />is suited to all crops commonly grown in the azea, includ-
<br />ing corn, sugaz beets, beans, alfalfa, small grain, potatoes,
<br />and onions. An example of a suitable cropping system is 3
<br />to 4 years of alfalfa followed by corn, corn for silage,
<br />sugar beets, small grain, or beans. Few conservation prac-
<br />tices aze needed to maintain top yields.
<br />All methods of irrigation are suitable, but furrow ir-
<br />rigation is the most common:.Barnyard manure and com-
<br />mercial fertilizer aze needed for top yields.
<br />Windbreaks and environmental plantings. of trees and
<br />shrubs commonly grown in the azea are generally well
<br />suited to this soil. Cultivation to control competing
<br />
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