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I$ SOIL SURVEY
<br />This soil has only fair potential for urban and rersea-
<br />tianal development. Above the sand and gavel sub-
<br />stratum the soil has moderate to high shrink swell low
<br />strength, and moderately slow permeability. These fea-
<br />tures create problems in dwelling and road construction.
<br />Excessive permeability in Lhe substratum can cause con-
<br />tamination of the ground water supply From septic tank
<br />leach fields. Sewage lagoons need to be lined. Capability
<br />subclass Its irrigated.
<br />22-Dacono clay loam, 1 to 3 percent slopes. This is a
<br />deep, well drained soil on terraces at elevations of 4,550
<br />to 4,970 feet It fonaed in mixed alluvium. Included in
<br />mapping are small, :tong 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 subsoil is
<br />greyish 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 irrigated areas this soil is suited to all crops com-
<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, sugar beets, small grain,
<br />or beans. Generally, such characteristics as a high rday
<br />content or a rapidly permeable substratum slightly
<br />restrict some crops.
<br />All methods of irrigation are suitable, but furrow ir-
<br />rigation is the most common. Proper irrigation water
<br />management is essential. Barnyard manure and commer-
<br />cial fertilizer are needed for top yields.
<br />Im nonirrigated areas most of the acreage is in small
<br />grain and is summer fallowed 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 precipitation is too low
<br />for beneficial use of fertilizer.
<br />Stubble mulch fanning, stripcropping, and minimum til-
<br />lage are needed to control soil blowing and water erosion.
<br />The potential ns~tive 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 con<fition 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 ve~getatian on this soil should be based
<br />on taking half and leaving half of the total annual produc-
<br />tion. Range pitting can help im reducing runoff. Seeding is
<br />desirable if the range is in poor rnndition. Western
<br />wheatgrass, blue grams, sideoats grams, buffalograss, pu-
<br />bescent wheatgrass, and crested wheatgrasa are suitable
<br />for seeding. The grass selected should meet the seasonal
<br />requirements of livestock It can be seeded into a clean,
<br />firm sorghum stubble or it can be drilled into a firm
<br />prepared 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 co control competing
<br />vegetation should be continued for as many years as
<br />possible following planting. Trees that are best suited and
<br />have good survival are Rocky Mountain juniper, eastern
<br />redcedaz, ponderosa pine, Siberian elm, Russian-0live, and
<br />hackberry. The shrubs best suited are skunkbush sumac,
<br />lilac, Siberian peashrub, 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 openJand 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 Tined.
<br />Capability subclass IIe irrigated, fIIc nonirrigated;
<br />Clayey Plains 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 30 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 area, includ-
<br />ing corn, sugar 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 are 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 are needed For top yields.
<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 rnntrol competing
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