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Home My WebLink About20072716.tiff • • • e:- �qEl �' kr`2 ..; it9 . ,,b.11---/;'- - r L, t P salt" 'i./C ' r K Y Sh W1:-‘1C. illik 'S 1 «W Ate, �.$ } # s PWrtyk r1 N _ a � MF'.J gt elk_.,.,,,,- �Yr<e# ' . yLCdt•. ', v .k.',..).,7'.3:f }� a�' n M1 f •L , �i p f 4 -14:,--:At ,. AA, ,. a� F 'v xHp k v�",,;, _"'_ r M x- Q,fL a &- y. �wh ` r "r',• 33 ig X +. ! t1 `.y,v.% ., f.- �; �4s'.Tj Si 6 d +.� 4, .d lD >r I gg ✓ y a.. a n K,j 3 w" 1 - crer y+- . --- n r. b .� abrc w.. b Cb 3�c b P x> E . ; c v '1 E t v{ co v.. I' .: ..4L_ 200 b m ,� _ 7-2716 q H N WELD COUNTY, COLORADO, SOUTHERN PART 43 livestock and wildlife share the range. Livestock watering ing. The grass selected should meet the seasonal require- f ilities also are utilized by various wildlife species. The ments of livestock. It can be seeded into a clean, firm and areas provide favorable habitat for pheasant and sorghum stubble, or it can be drilled into a firm prepared rning dove. Many nongame species can be attracted seedbed. Seeding early in spring has proven most success- by establishing areas for nesting and escape cover. ful. The underlying shale is the most limiting feature of Windbreaks and environmental plantings of trees and this soil. Neither septic tank absorption fields nor sewage shrubs commmonly grown in the area are generally well lagoons function properly. In places the underlying shale suited to this soil. Cultivation to control competing has high shrink-swell potential. Environmental and beau- vegetation should be continued for as many years as tification plantings of trees and shrubs can be difficult to possible following planting. Trees that are best suited and establish. Capability subclass IVe irrigated, VIe nonir- have good survival are Rocky Mountain juniper, eastern rigated; Loamy Plains range site. redcedar, ponderosa pine, Siberian elm, Russian-olive, and 66—Ulm clay loam, 0 to 3 percent slopes. This is a hackberry. The shrubs best suited are skunkbush sumac, deep, well drained soil on plains at elevations of 5,075 to lilac, Siberian peashrub, and American plum. 5,200 feet. It formed in alluvial and eolian sediments from Wildlife is an important secondary use of this soil. The shale. Included in mapping are small areas of soils that cropland areas provide favorable habitat for ring-necked have shale between 40 and 60 inches. Also included are pheasant and mourning dove. Many nongame species can small areas of soils where the surface layer and subsoil be attracted by establishing areas for nesting and escape have been recharged with lime from irrigation. cover. For pheasants, undisturbed nesting cover is essen- Typically the surface layer of this Ulm soil is brown tial and should be included in plans for habitat develop- clay loam about 5 inches thick. The subsoil is brown and meet, especially in areas of intensive agriculture. Range- pale brown clay about 14 inches thick. The substratum to land wildlife, for example, the pronghorn antelope, can be a depth of 60 inches is clay and clay loam. attracted by developing livestock watering facilities, Permeability is slow. Available water capacity is high. managing livestock grazing, and reseeding where needed. The effective rooting depth is 60 inches or more. Surface This soil has poor potential for urban and recreational runoff is medium, and the erosion hazard is low. development. Slow permeability and high shrink swell In irrigated areas this soil is suited to all crops com- cause problems in dwelling and road construction. Capa- monly grown in the area, including corn, sugar beets, bility subclass Ile irrigated, IVe nonirrigated; Clayey beans, alfalfa, and small grain. An example of a suitable Plains range site. c ing system is 3 to 4 years of alfalfa followed by 67—Ulm clay loam, 3 to 5 percent slopes. This is a c�corn for silage, sugar beets, small grain, or beans. deep, well drained soil on plains at elevations of 5,075 to Land leveling, ditch lining, and installing pipelines are 5,200 feet. It formed in alluvial and eolian sediments from needed for proper water applications. shale. Included in mapping are small areas of soils that All methods of irrigation are suitable, but furrow ir- have shale between depths of 40 and 60 inches. Also in- rigation is the most common. Barnyard manure and com- eluded are small areas of soils where the surface layer mercial fertilizer are needed for top yields. and subsoil have been recharged with lime from irriga- In nonirrigated areas this soil is suited to winter wheat, tion. barley, and sorghum. Most of the acreage is planted to Typically the surface of this Ulm soil is brown clay winter wheat. The predicted average yield is 28 bushels loam about 5 inches thick. The subsoil is brown and pale per acre. The soil is summer fallowed in alternate years brown clay about 12 inches thick. The substratum to a to allow moisture accumulation. Generally precipitation is depth of 60 inches is clay and clay loam. too low for beneficial use of fertilizer. Permeability is slow. Available water capacity is high. Stubble mulch farming, striperopping, and minimum til- The effective rooting depth is 60 inches or more. Surface lage are needed to control soil blowing and water erosion. runoff is medium, and the erosion hazard is moderate. Terracing also may be needed to control water erosion. In irrigated areas this soil is suited to the crops com- The potential native vegetation is dominated by monly grown in the area. Perennial grasses and alfalfa or western wheatgrass and blue grama. Buffalograss is also close grown crops should be grown at least 50 percent of present. Potential production ranges from 1,000 pounds the time. Contour ditches and corrugations can be used in per acre in favorable years to 600 pounds in unfavorable irrigating close grown crops and pasture. Furrows, con- years. As range condition deteriorates, a blue grama-buf- tour furrows, and cross slope furrows are suitable for row falograss sod forms. Undesirable weeds and annuals in- crops. Sprinkler irrigation is also desirable. Keeping til- vade the site as range condition becomes poorer. lage to a minimum and utilizing crop residue help to con- Management of vegetation on this soil should be based trol erosion. Maintaining fertility is important. Crops on taking half and leaving half of the total annual produc- respond to applications of phosphorus and nitrogen. tion. Range pitting can reduce runoff. Seeding is desirable In nonirrigated areas this soil is suited to winter wheat, if the range is in poor condition. Western wheatgrass, barley, and sorghum. Most of the acreage is planted to bl rama,i sideoats grama, buffalograss, pubescent winter wheat. The predicted average yield is 28 bushels w> ass, and crested wheatgrass are suitable for seed- per acre. The soil is summer fallowed in alternate years u 52 SOIL SURVEY •he limited capacity of this soil to support a load. Capa- Management of vegetation on this soil should be based bility class I irrigated. on taking half and leaving half of the total annual produc- 82—Wiley-Colby complex, 1 to 3 percent slopes. This tion. Seeding is desirable if the range is in poor condition. nearly level map unit is on smooth plains in the western Sideoats grama, little bluestem, western wheatgrass, blue part of the survey area at elevations of 4,850 to 5,000 grama, pubescent wheatgrass, and crested wheatgrass are feet. The Wiley soil makes up about 60 percent of the suitable for seeding. The grass selected should meet the unit, and the Colby soil about 30 percent. About 10 per- seasonal requirements of stubble or livestock. ives k..tIt t can be drilled seeded into cent is Heldt silty clay and Weld loam. a clean, firm sorghum The Wiley soil is deep and well drained. It formed in firm prepared seedbed. Seeding early in spring has calcareous eolian deposits. Typically the surface layer is proven most successful. pale brown silt loam about 11 inches thick. The subsoil is Windbreaks and environmental plantings are generally pale brown silty clay loam about 23 inches thick. The sub- vegetation to these be continued asoils. ltCultivationtion tas control many ocompeting stratum to a depth of 60 inches is very pale brown silty g tied should ars as clay loam. possible following planting. Trees that are best suited and Permeability is moderately slow. Available water have good survival are Rocky Mountain juniper, eastert capacity is high. The effective rooting depth is 60 inches redcedar, ponderosa pine, Siberian elm, Russian-olive, anc or more. Surface runoff is medium, and the erosion lilac,hackberry. Sie berian shrubs best suited are and American plum.unkbush sumac hazard is moderate. dove The Colby soil also is deep and well drained and formed Openland wildlife, such as pheasant, mourning in calcareous eolian deposits. Typically the surface layer and cottontail are best suited to these soils. Wildlife is pale brown loam about 7 inches thick. The underlying habitat development, including tree and shrub planting: material is very pale brown silt loam to a depth of 60 and grass plantings to serve as nesting areas, should bi inches. successful without irrigation during most years. Under ir Permeability is moderate. Available water capacity is rigation, good wildlife habitat can be established, benefit high. The effective rooting depth is 60 inches or more. ing many kinds of openland wildlife. Surface runoff is medium, and the erosion hazard is e eat onlhe y soil has only fair development. Slow potential for urban an permeability, moderat moderate. re • This map unit is used for irrigated and nonirrigated shrink-swell potential, and limited bearing capacity caus cropland and for rangeland, wildlife habitat, and urban problems in dwelling and road construction. The Colb development. soil has good potential for urban and recreational develol In irrigated areas these soils are suited to all crops ment. Road design can be modified to compensate for th commonly grown in the area, including corn, sugar beets, limited capacity of this soil to support a load. Capabilit beans, alfalfa, small grain, and onions. An example of a subclass Ire irrigated, IVe nonirrigated; Loamy Plain suitable cropping system is 3 to 4 years of alfalfa fol- range site. lowed by corn, corn for silage, sugar beets, small grain, or 83—Wiley-Colby complex, 3 to 5 percent slopes. Th beans. Land leveling, ditch lining, and installing pipelines gently sloping map unit is on plains at elevations of 4,8f may be needed for proper water applications. to 5,000 feet. The Wiley soil makes up about 60 percent All methods of irrigation are suitable, but furrow ir- the unit, and the Colby soil about 30 percent. About rigation is the most common. Barnyard manure and corn- percent is Heldt silty clay and Weld loam. mercial fertilizer are needed for top yields. The Wiley soil is deep and well drained. It formed In nonirrigated areas these soils are suited to winter calcareous eolian deposits. Typically the surface layer wheat, barley, and sorghum. Most of the acreage is pale brown silt loam about 11 inches thick. The subsoil planted to winter wheat. The predicted average yield is pale brown silty clay loam about 23 inches thick. The su 28 bushels per acre. The soil is summer fallowed in al- stratum to a depth of 60 inches is very pale brown sil ternate years to allow moisture accumulation. Generally clay loam. precipitation is too low for beneficial use of fertilizer. Permeability is moderately slow. Available wat Stubble mulch farming, striperopping, and minimum til- capacity is high. The effective rooting depth is 60 inch lage are needed to control soil blowing and water erosion. or more. Surface runoff is medium to rapid, and the ei Terracing also may be needed to control water erosion. sion hazard is moderate. The potential native vegetation is dominated by blue The Colby soil also is deep and well drained and form grama. Several mid grasses such as western wheatgrass in calcareous eolian deposits. Typically the surface la) and needleandthread are also present. Potential produc- is pale brown loam about 7 inches thick. The underlyi tion ranges from 1,600 pounds per acre in favorable years material is very pale brown silt loam to a depth of to 1,000 pounds in unfavorable years. As range condition inches. • deteriorates, the mid grasses decrease; blue grama, buf- Permeability is moderate. Available water capacity falograss, snakeweed, yucca and fringed sage increase; high. The effective rooting depth is 60 inches or me and forage production drops. Undesirable weeds and an- Surface runoff is medium to rapid, and the erosion haz nuals invade the site as range condition becomes poorer. is moderate. Hello