The URL can be used to link to this page

Browse Search

Home My WebLink About20080082.tiff • 1211.T 0 --.I._ R. 68 W. 2125 000 FEET _, ,, :,, - e��— syr,.„..i LL kfin-,. '"'""wk 'MO'? p� µ A'" "' .z 3M s3t - ` ',� .i +asb, a mow, _ S. w -..... s- h' • j.'y(, ..:tip_ y"Y"'"l .:i_.. $ 4 r z. 0O 5 '+. , " cxp�w. tl ,.IM{. 1 \ c. 'K yam. '' .• a s _yv I," ' y , 'g "rte TWIN # .f .. "! Or• ; .t •`j i MOUNDS 4., ' .«t'. .,.�._..a„-r.•rctnw�'ssresa..—W.�.>.4, ' . _. '�*. __•.,.+.. WELD COUNTY, COLORADO, SOUTHERN PART 29 have good survival are Rocky Mountain juniper, eastern The potential native vegetation is dominated by 0i edcedar, ponderosa pine, Siberian elm, Russian-olive, and western wheatgrass and blue grama. Buffalograss is also ackberry. The shrubs best suited are skunkbush sumac, present. Potential production ranges from 1,000 pounds lac, Siberian peashrub, and American plum. per acre in favorable years to 600 pounds in unfavorable Wildlife is an important secondary use of this soil. The years. As range condition deteriorates, a blue grama-buf- cropland areas provide favorable habitat for ring-necked falograss sod forms. Undesirable weeds and annuals in- pheasant and mourning dove. Many nongame species can vade the site as range condition becomes poorer. be attracted by establishing areas for nesting and escape Management of vegetation of this soil should be based cover. For pheasants, undisturbed nesting cover is essen- on taking half and leaving half of the total annual produc- tial and should be included in plans for habitat develop- tion. Range pitting can help in reducing runoff. Seeding is ment, especially in areas of intensive agriculture. desirable if the range is in This soil has fair to poor potential for urban develop- wheatgrass, g poor condition. Western sideoats ment. It has moderate to high shrink swell, low strength, bescent wheatgrass, and crested wheatgrassf care suitable and moderately slow permeability. These features create for seeding. The grass selected should meet the seasonal problems in dwelling and road construction. Those areas requirements of livestock. It can be seeded into a clean, that have loam or sandy loam in the lower part of the firm sorghum stubble, or it can be drilled into a firm substratum are suitable for septic tank absorption fields prepared seedbed. Seeding early in spring has proven and foundations. Some areas of this soil are adjacent to most successful. streams and are subject to occasional flooding. The poten- Windbreaks and environmental plantings are generally tial is fair for such recreational development as camp and well suited to this soil. Cultivation to control competing picnic areas and playgrounds. Capability class I irrigated. vegetation should be continued for as many years as 42—Nunn clay loam, 1 to 3 percent slopes. This is a possible following planting. Trees that are best suited and deep, well drained soil on terraces and smooth plains at have good survival are Rocky Mountain juniper, eastern elevations of 4,550 to 5,150 feet. It formed in mixed allu- redcedar, ponderosa pine, Siberian elm, Russian-olive, and vium and eolian deposits. Included in mapping are small, hackberry. The shrubs best suited are skunkbush sumac, long and narrow areas of sand and gravel deposits and lilac, Siberian peashrub, and American plum. small areas of soils that are subject to occasional flooding. Wildlife is an important secondary use of this soil. The Some leveled areas are also included. cropland areas provide favorable habitat for ring-necked Typically the surface layer of this Nunn soil is grayish pheasant and mourning dove. Many nongame species can own clay loam aobut 9 inches thick. The subsoil is light be attracted by establishing areas for nesting and escape ownish gray clay loam about 14 inches thick. The upper cover. For pheasants, undisturbed nesting cover is essen- part of the substratum is light brownish gray clay loam. tial and should be included in plans for habitat develop- The lower part to a depth of 60 inches is brown sandy ment, especially in areas of intensive agriculture. Range- loam. land wildlife, for example, the pronghorn antelope, can be Permeability is moderately slow. Available water attracted by developing livestock watering facilities, capacity is high. The effective rooting depth is 60 inches managing livestock grazing, and reseeding where needed. or more. Surface runoff is medium, and the erosion This soil has fair to poor potential for urban develop- hazard is low. ment. It has moderate to high shrink swell, low strength, In irrigated areas this soil is suited to all crops com- and moderately slow permeability. These features create monly grown in the area, including corn, sugar beets, problems in dwelling and road construction. Those areas beans, alfalfa, small grain, potatoes, and onions. An exam- that have loam or sandy loam in the lower part of the c_ ple of a suitable cropping system is 3 to 4 years of alfalfa substratum are suitable for septic tank absorption fields followed by corn, corn for silage, sugar beets, small grain, and foundations. Some areas of this soil are adjacent to or beans. Generally such characteristics as the high clay streams and are subject to occasional flooding. The poten- content or the rapidly permeable substratum slightly tial is fair for such recreational development as camp and restrict some crops. picnic areas and pla ir- All methods of irrigation are suitable, but furrow ir- rigated, Mc nonirrigated; Capability ClayeyPlains range site ss IIe rigation is the most common. Proper irrigation water 43—Nunn loamy sand, 0 to 1 percent slopes. This is a management is essential. Barnyard manure and commer- deep, well drained soil on terraces at elevations of 4,700 cial fertilizer are needed for top yields. to 4,900 feet. It formed in alluvium along Box Elder In nonirrigated areas most of the acreage is in small Creek. Included in mapping are small areas of soils that grain and it is summer fallowed in alternate years. have a loamy subsoil and small areas of soils that are sub- Winter wheat is the principal crop. The predicted average ject to rare flooding. r yield is 33 bushels per acre. If the crop is winterkilled, Typically the surface layer of this Nunn soil is brown spring wheat can be seeded. Generally precipitation is too loamy sand overburden about 9 inches thick. The subsoil low for beneficial use of fertilizer. is dark to very dark grayish brown clay loam about 21 fikStubble mulch farming, striperopping, and minimum til- inches thick. The substratum to a depth of 60 inches is are needed to control soil blowing and water erosion. loamy very fine sand, loamy sand, or sand. 0 0 52 SOIL SURVEY the limited capacity of this soil to support a load. Capa- Management of vegetation on this soil should be IN bility class I irrigated. on taking half and leaving half of the total annual pro • 82—Wiley-Colby complex, 1 to 3 percent slopes. This tion. Seeding is desirable if the range is in poor condii nearly level map unit is on smooth plains in the western Sideoats grama, little bluestem, western wheatgrass, I part of the survey area at elevations of 4,850 to 5,000 grama, pubescent wheatgrass, and crested wheatgrass feet. The Wiley soil makes up about 60 percent of the suitable for seeding. The grass selected should meet unit, and the Colby soil about 30 percent. About 10 per- seasonal requirements of livestock. It can be seeded cent is Heldt silty clay and Weld loam. a clean, firm sorghum stubble or it can be drilled ini The Wiley soil is deep and well drained. It formed in firm prepared seedbed. Seeding early in spring 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 gener pale brown silty clay loam about 23 inches thick. The sub- well suited to these soils. Cultivation to control compel stratum to a depth of 60 inches is very pale brown silty vegetation should be continued for as many years clay loam. possible following ted Permeability is moderately slow. Available water haveod survival are Rocky tuntain nt are best juniper, east capacity is high. The effective rooting depth is 60 inches redcedagr, ponderosa pine, Siberian elm, Russian-olive, or more. Surface runoff is medium, and the erosion hackberry. The shrubs best suited are skunkbush sun hazard is moderate. lilac, Siberian peashrub, and American plum. The Colby soil also is deep and well drained and formed Openland wildlife, such as pheasant, mourning do in calcareous eolian deposits. Typically the surface layer and cottontail are best suited to these soils. Wild is pale brown loam about 7 inches thick. The underlying habitat development, including tree and shrub planth material is very pale brown silt loam to a depth of 60 and grass plantings to serve as nesting areas, should inches. successful without irrigation during most years. Under Permeability is moderate. Available water capacity is rigation, good wildlife habitat can be established, benei 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 The Wiley soil has only fair potential for urban a moderate. recreational development. Slow permeability,This map unit is used for irrigated and nonirrigated shrink-swell potential, and limited bearing capacity cat cropland and for rangeland, wildlife habitat, and urban problems in dwelling and road construction. The Col development. soil has good potential for urban and recreational devek • In irrigated areas these soils are suited to all crops ment. Road design can be modified to compensate for t commonly grown in the area, including corn, sugar beets, limited capacity of this soil to support a load. Capabili beans, alfalfa, small grain, and onions. An example of a subclass IIe irrigated, IVe nonirrigated; Loamy Plai 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. TI beans. Land leveling, ditch lining, and installing pipelines gently sloping map unit is on plains at elevations of 4,8 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 com- 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 sul 28 bushels per acre. The soil is summer fallowed in al- stratum to a depth of 60 inches is very pale brown silt ternate years to allow moisture accumulation. Generally clay loam. precipitation is too low for beneficial use of fertilizer. Permeability is moderately slow. Available watt 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 en 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 forme grama. Several mid grasses such as western wheatgrass in calcareous eolian deposits. Typically the surface laye and needleandthread are also present. Potential produc- is pale brown loam about 7 inches thick. The underlyin, tion ranges from 1,600 pounds per acre in favorable years material is very pale brown silt loam to a depth of 6 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 i falograss, snakeweed, yucca and fringed sage increase; high. The effective rooting depth is 60 inches or more and forage production drops. Undesirable weeds and an- Surface runoff is medium to rapid, and the erosion hazar< nuals invade the site as range condition becomes poorer. is moderate. • 41 I I' SOIL SURVEY t' - require sealing. 60 percent of the unit. Aquents, which have a lighter These are deep. not Capability subclass colored surface layer, make up about 35 percent. About 5 recent alluvium. N percent is Aquepts and Bankard sandy loam, soils have a mottle �l . 71�ka. This is a deep, These are deep, poorly drained soils that formed in or clayey surface I suns of 4,500 to 4,900 recent alluvium. No one pedon is typical. Commonly the tends to a depth of O) ntIpMilled by the major soils have a mottled, mildly alkaline to moderately al- a gleyed layer in ti � am of soils that kaline loamy or clayey surface layer and underlying Most of the acre bduded are small, material and are underlain by sand or sand and gravel water table is at m deposits. within 48 inches. In places they have a gleyed layer in the the peak of the irri . ' *tan soil is grayish underlying material. These soils are i • 'n0 subsoil is brown Most of the acreage is subject to flooding. The water Some small areas a I' 'l sandy clay loam table is at or near the surface early in spring and recedes The potential ' calcareous loamy to as deep as 48 inches late in fall in some years. switchgrass, prairi l" These soils are used for rangeland and wildlife habitat. big bluestem, indi Sidtr capacity are Some small areas have been reclaimed by major drainage wheatgrass, sedge, liradi'i 20 to 40 inches. and leveling and are used for irrigated crops. in the swampy sp +, hazard is low. The potential native vegetation is dominated by alkali Potential productio , bngated crops. It sacaton, switchgrass, and western wheatgrass. Saltgrass, favorable years to the area, includ- g bluegrass p range condition di sedge, rush, and alkali are also prominent. '• ', a0,t grain, potatoes, Potential production ranges from 3,000 pounds per acre in decrease, productic 1• Jping system is 3 favorable years to 2,000 pounds in unfavorable years. As increase. The farm, H sa corn for silage, range condition deteriorates, the switchgrass, alkali increased the amou .. land leveling, ditch sacaton, and western wheatgrass decrease and saltgrass, Management of '•r: be needed for proper sedge, and rush increase. on taking half and eatable, but furrow ir- Management of vegetation should be based on taking tion. Switchgrass, half and leaving half of the total annual production. Seed- wheatgrass, pubes yard manure and com- ing is difficult and costly because numerous tillage prac-"-09 yields. g g grass, tall wheatg z plantins of trees and tices are required to eliminate the saltgrass sod. seeding. The plan ,: area are generally well Switchgrass, western wheatgrass, alkali sacaton, tall requirements of Iii wheatgrass, and tall fescue are suitable for seeding. They prepared seedbed i to control competing P or as many years as can be seeded into a clean, firm seedbed. Seedbed Seeding early in s s that are best suited and preparation usually requires more than 1 year to lage is needed to el Mountain juniper, eastern eliminate the saltgrass sod. A grass drill should be used. Wetland wildlife. -. elm, Russian-olive, and Seeding early in spring has proven most successful. The wetland plant: are skunkbush sumac, Wetland wildlife, especially waterfowl, utilize this unit. as well as some r,.riean plum The wetland plants provide nesting and protective cover, where wildlife obta ; elements that are highly as well as some food. The nearby irrigated cropland, tive cover, makes I uding pheasant, cotton- where wildlife obtain much of their food and fmd protec- openland wildlife. .< as wheat, corn, and tive cover, makes this unit valuable to both wetland and Openland wildlif • for openland wildlife, openland wildlife. I cover and nesting shrub plantings and Openland wildlife, especially pheasant, use this unit for } areas. These valua . ? enhance openland wil- cover and nesting. Deer find excellent cover in some ' from fire and fe areas. overuse by livesto. good potential for urban These valuable wildlife areas should be protected from bility subclass VIv ,' ..e chief limiting soil fea- fire and fenced to prevent encroachment and overuse by Aquepts in Wet Me ' -. the shrink-swell poten- livestock. They should not be drained. 5—Ascalon sand and dries and the rapid These soils have good potential as a source of sand and a deep, well draine vel substratum. Septic gravel. Capability subclass VIw; Salt Meadow range site. . to 5,200 feet. It fo. properly, but in places the 4—Aquolls and Aquepts, flooded. This nearly level j are small areas of r 'enough fines to properly map unit is in depressions in smooth plains and along the Typically the sin lagoons require sealing. bottoms of natural drainageways throughout the survey 10 inches thick. Th well. Capability subclass area. Aquolls, which have a dark colored surface layer, brown sandy clay make up about 55 percent of the unit. Aquepts, which stratum to a dept} velly substratum. This have a lighter colored surface layer, make up about 25 loam. lands and flood plains percent. About 20 percent is soils that are well drained Permeability is ;;Ake survey area. Aquolls, and soils that have sandstone or shale within 48 inches of high. The effectiv layer, make up about the surface. Surface runoff is s o • • WELD COUNTY, COLORADO, SOUTHERN PART 9 These are deep, poorly drained soils that formed in If summer fallowed in alternate years, this soil is well recent alluvium. No one pedon is typical. Commonly the suited to winter wheat, barley, and sorghum. Winter •soils have a mottled, mildly to moderately alkaline loamy wheat is the principal crop. The predicted average yield is or clayey surface layer and underlying material that ex- 33 bushels per acre. If the crop is winterkilled, spring tends to a depth of 60 inches or more. In places they have wheat can be seeded. Generally precipitation is too low a gleyed layer in the underlying material. for beneficial use of fertilizer. Most of the acreage is subject to excessive runoff. The Stubble mulch farming, striperopping, and minimum til- water table is at or near the surface in spring and during lage are needed to control soil blowing and water erosion. the peak of the irrigation season. Terracing also may be needed to control water erosion. These soils are used for rangeland and wildlife habitat. The potential native vegetation on this range site is Some small areas are irrigated pasture. dominated by sand bluestem, sand reedgrass, and blue The potential native vegetation is dominated by grama. Needleandthread, switchgrass, sideoats grama, switchgrass, prairie cordgrass, saltgrass, alkali sacaton, and western wheatgrass are also prominent. Potential big bluestem, indiangrass, western wheatgrass, slender Production ranges from 2,200 pounds per acre in favora- wheatgrass, sedge, and rush. Cattails and bullrush grow ble years to 1,800 pounds in unfavorable years. As range in the swampy spots associated with these range sites. condition deteriorates, the sand bluestem, sand reedgrass, Potential production ranges from 4,000 pounds per acre in and switchgrass decrease and blue grama, sand dropseed, favorable years to 3,000 pounds in unfavorable years. As and sand sage increase. Annual weeds and grasses invade range condition deteriorates, the tall and mid grasses the site as range condition becomes poorer. decrease, production drops, and saltgrass, sedge, and rush Management of vegetation should be based on taking increase. The farming and irrigation in adjacent areas has half and leaving half of the total annual production. Seed- ing is desirable if the range is in poor condition. Sand increased the amount of salts on much of the acreage. bluestem, sand reedgrass, switchgrass, sideoats grama, Management of vegetation on this soil should be based on taking half and leaving half of the total annual produc- blue grama, pubescent wheatgrass, and crested wheat- tion. Switchgrass, big bluestem, indiangrass, western grass are suitable for seeding. The grass selected should wheatgrass, pubescent wheatgrass, intermediate wheat- meet the seasonal requirements of livestock. It can be grass, seeded into a clean, firm sorghum stubble, or it can be tall wheatgrass, and tall fescue are suitable for seeding. The plants selected should met the seasonal drilled into a firm prepared seedbed. Seeding early in spring has proven most successful. requirements of livestock. For successful seeding, a firm Windbreaks and environmental plantings are generally •prepared seedbed is needed. A grass drill should be used. suited to this soil. Soil blowing, the principal hazard in Seeding early in spring has proven most successful. Til- establishing trees and shrubs, can be controlled by cul- lage is needed to eliminate the undesirable vegetation. tivating only in the tree row and by leaving a strip of Wetland wildlife, especially waterfowl, utilize this unit. vegetation between the rows. Supplemental irrigation The wetland plants provide nesting and protective cover may be needed at the time of planting and during dry as well as some food. The nearby irrigated cropland, periods. Trees that are best suited and have good survival where wildlife obtain much of their food and find protec- are Rocky Mountain juniper, eastern redcedar, ponderosa �' tive cover, makes this unit valuable to both wetland and pine, Siberian elm, Russian-olive, and hackberry. The openland wildlife. shrubs best suited are skunkbush sumac, lilac, and Siberi- Openland wildlife, especially pheasant, use this unit for an peashrub. cover and nesting. Deer find excellent cover in some Wildlife is an important secondary use of this soil. The areas. These valuable wildlife areas should be protected cropland areas provide favorable habitat for ring-necked ''. 3. from fire and fenced to prevent encroachment and pheasant and mourning dove. Many nongame species can .4, overuse by' livestock. bility subclass VI should not drained. w; Aquolls inSaltMeadowrange site, cover.r Fored by establishing nesting pheasants, nesting coved escape r is es en I Aquepts in Wet Meadow range site. tial and should be included in plans for habitat develop- 5—Ascalon sandy loam, 1 to 3 percent slopes. This is ment. Rangeland wildlife, for example, the pronghorn an- ,,,;. a deep, well drained soil on uplands at elevations of 4,600 telope, can be attracted by developing livestock watering g. to 5,200 feet. It formed in alluvium. Included in mapping facilities, managing livestock grazing, and reseeding �„; are small areas of rock outcrop. where needed. y,y„ Typically the surface layer is brown sandy loam about Few areas of this Ascalon soil are in major growth and ;,:r 10 inches thick. The subsoil is pale brown and yellowish urbanized centers. The shrink-swell potential of the sub- brown sandy clay loam about 15 inches thick. The sub- soil as it wets and dries is the most limiting soil feature .,;"{ stratum to a depth of 60 inches is calcareous fine sandy that must be considered in planning homesites and con- 6 loam. structing roads. Capability subclass IIIe nonirrigated; .• Permeability is moderate. Available water capacity is Sandy Plains range site. 1• ', high. The effective rooting depth is 60 inches or more. 6—Ascalon sandy loam, 3 to 5 percent slopes. This is Surface runoff is slow, and the erosion hazard is low. a deep, well drained soil on uplands at elevations of 4,600 it • •1 Hello