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Home My WebLink About981870.tiff U. S. DEPARTMENT OF AGRICULTURE ro J D� SOIL CONSERVATION SERVICE 22ranwrl1i R.65 W. I R. 64 W. (Joins sheet 9) Y_ p ,53 70 21 41 3] ',_ 70 en P l�i .. - 1 "A 73 JJor•Oo/1/ 3 .. 70 ®® 69 69 �� f 69 69 26 21 25 70 70 28 / 0 70 72 ' 69 69 %$, 3 70 i 70 5 1. 69 / / 70 73 70 ' I, \\ L \\ 70 69 73 72 � ,rc. S56 69 2 4 73 47 72 70 38 72 47 IJ \ 57 48 3 0` --\ 72 4, ` 'L 44 57 '\ 72 35 ,- t6 49 ]3 4 31- 32r 33 47 73 (/ 38 73 i 44 . • 38 �' _ 72 :T art' 47 38 45 72O 57 74 57 74 73 73 fiR i, ilt es A 4 .p 57 . 72� ✓ .. 47 + 47 4/ o xi � 51 4 63 48 -Thee 72 + 51 5] 51 7 • 6O 4 CO 1 73 �� 38 s Y., 'Y V 4 } CO 1 \ 6 47 48 5 0 it .47 ` 62 ...c.,,,, 57 +'/ 62 37 i, 72 4�.. ^ rl ', 48 0 . ��1(((...��VAA �._` d \d=� WELD COUNTY, COLORADO, SOUTHERN PART 25 can be drilled into a firm prepared seedbed. Plowing and Permeabilty is rapid. Available water capacity is frilling on the contour minimize runoff and soil losses. moderate. The water table is usually about 24 to 36 inches .,eeding early in spring has proven most successful. below the surface. Surface runoff is slow, and the erosion Windbreaks and environmental plantings are generally hazard is low. well suited to this soil. Cultivation to control competing This unit is used as rangeland and irrigated cropland. vegetation should be continued for as many years as Cropping in irrigated areas is limited to the crops possible following planting. Trees that are best suited and tolerant of water and salts. Light, frequent irrigations by have good survival are Rocky Mountain juniper, eastern furrows and flooding reduce the salts accumulation. redcedar, ponderosa pine, Siberian elm, Russian-olive, and Pasture is the best use. Tall wheatgrass, tall fescue, and hackberry. The shrubs best suited are skunkbush sumac, annual sweetclover are some of the best suited crops. lilac, Siberian peashrub, and American plum. Commercial fertilizers improve the amount and value of Wildlife is an important secondary use of this soil. The forage produced. cropland areas provide favorable habitat for ring-necked The potential native vegetation on this unit is pheasant and mourning dove. Many nongame species can dominated by switchgrass, little bluestem, sand reedgrass, be attracted by establishing areas for nesting and escape and western wheatgrass. Indiangrass, sand bluestem, cover. For pheasants, undisturbed nesting cover is essen- prairie cordgrass, slender wheatgrass, alkali sacaton, salt- tial and should be included in plans for habitat develop- grass, sedge, and rush are also present. Potential produc- ment, especially in areas of intensive agriculture. Range- tion ranges from 4,000 pounds per acre in favorable years land wildlife, for example, the pronghorn antelope, can be to 3,000 pounds in unfavorable years. As range condition attracted by developing livestock watering facilities, deteriorates, the switchgrass, sand bluestem, indiangrass, managing livestock grazing, and reseeding where needed. little bluestem, and prairie cordgrass decrease and salt- This soil has good potential for urban and recreational grass, blue grama, sand dropseed, sedge, and rush in- development. Increased population growth in the survey crease. Undesirable weeds and annuals invade the site as area has resulted in increased homesite construction. The range condition becomes poorer. chief limiting soil feature for urban development and road Management of vegetation on this unit should be based construction is the limited capacity of this soil to support on taking half and leaving half of the total annual produc- a load. Septic tank absorption fields function properly, but tion. Seeding is desirable if the range is in poor condition. community sewage systems should be provided if the Switchgrass, sand bluestem, sand reedgrass, western population density increases. Because of the permeability wheatgrass, indiangrass, pubescent wheatgrass, and inter- the substratum, sewage lagoons must be sealed. mediate wheatgrass are suitable for seeding. The plants ..awns, shrubs, and trees grow well. Capability subclass selected should meet the seasonal requirements of I e ' 'gated, VIe nonirrigated; Loamy Plains range site. livestock. They can be seeded into a clean, firm sorghum 35 Loup-Boel loamy sands, 0 to 3 percent slopes. stubble, or they can be drilled into a firm prepared level to nearly level map unit is on stream bottoms seedbed. Seeding early in spring has proven most success- and in drainageways of the sandhills at elevations of 4,550 ful. Capability subclass IVw irrigated, VIw nonirriated; to 4,750 feet. The Loup soil occupies the lower or depres- Sandy Meadow range site. sional areas, which receive additional runoff. It makes up 36—Midway-Shingle complex, 5 to 20 percent slopes. about 55 percent of the unit. The Boel soil occupies the This moderately sloping to strongly sloping map unit is on slightly higher elevations. It makes up about 35 percent upland hills and ridges at elevations of 5,050 to 5,250 feet. of the unit. About 10 percent of the unit is Osgood sand The Midway soil makes up about 50 percent of the unit, and Valent sand. and the Shingle soil about 35 percent. About 15 percent is The Loup soil is deep and poorly drained. It formed in Renohill clay loam and Tassel fine sandy loam. The Mid- sandy alluvium. Typically the surface layer is very dark way soil differs from the Shingle soil in having more than grayish brown, mottled loamy sand about 16 inches thick. 35 percent clay in the underlying material. The upper 24 inches of the underlying material is light The Midway soil is shallow and well drained. It formed brownish gray, mottled1;loamy sand. The lower part to a in residuum from calcareous shale. Typically the surface depth of 60 inches is light brownish gray, mottled sandy layer is light olive brown clay about 7 inches thick. The loam. underlying Permeability is rapid. Available water capacity is inches thick. Depth material to calcareous clayey is light brownish gray l haleiabout s about 13 moderate. The water table is at or near the surface in inches. spring and about 36 inches below the surface in the fall. Permeability is slow. Available water capwity is low. Surface runoff is slow, and the erosion hazard is low. The effective rooting depth is 10 to 20 inches. Surface ru- The Boel soil is deep and somewhat poorly drained. It noff is rapid, and the erosion hazard is moderate to high. formed in stratified sandy alluvium. Typically the surface The Shingle soil also is shallow and well drained and layer is grayish brown loamy sand about 14 inches thick. formed in residuum from calcareous shale. Typically the The underlying material to a depth of 60 inches is pale surface layer is grayish brown loam about 6 inches thick. br- n and very pale brown, stratified, mottled loamy The underlying material is light yellowish brown clay sa loam about 12 inches thick. Depth to calcareous clayey ( iPg7€ ) • 44 SOIL SURVEY to allow moisture accumulation. Generally precipitation is Permeability is rapid. Available water capacity is low. too low to make beneficial use of fertilizer. The effective rooting depth is 60 inches or more. Surface Stubble mulch farming, striperopping, and minimum til- runoff is medium, and the erosion hazard is moderate. lage are needed to control soil blowing and water erosion. The potential native vegetation is dominated by h. ,a Terracing also may be needed to control water erosion. bluestem, sideoats grama, sand reedgrass, blue grama, The potential native vegetation is dominated by hairy grama, switchgrass, and needleandthread. Potential western wheatgrass and blue grama. Buffalograss is also production ranges from 700 pounds per acre in favorable present. Potential production ranges from 1,000 pounds years to 200 pounds in unfavorable years. As range condi- per acre in favorable years to 600 pounds in unfavorable tion deteriorates, the tall and mid grasses decrease, blue years. As range condition deteriorates, a blue grama-buf- grama and hairy grama increase, and forage production falograss sod forms. Undesirable weeds and annuals in- drops. vade the site as range condition becomes poorer. Management of vegetation should be based on taking Management of vegetation on this soil should be based half or less of the total annual production. Deferred graz- on taking half and leaving half of the total annual produc- ing is practical in improving range condition. Seeding and tion. Range pitting can reduce runoff. Seeding is desirable mechanical treatment are impractical. if the range is in poor condition. Western wheatgrass, Windbreaks and environmental plantings generally are blue grama, sideoats grama, buffalograss, pubescent not suited to these soils. Onsite investigation is needed to wheatgrass, and crested wheatgrass are suitable for seed- determine if plantings are feasible. ing. The grass selected should meet the seasonal require- Wildlife populations are limited because the necessary menu of livestock. It can be seeded into a clean, firm habitat elements are lacking. Because most of the acreage sorghum stubble, or it can be drilled into a firm prepared is rangeland, only rangeland wildlife, for example scaled seedbed. Seeding early in spring has proven most success- quail and antelope, are typical. Extreme care is needed in ful. managing livestock grazing in order to provide suitable Windbreaks and environmental plantings of trees and habitat on these soils. Potential is poor for urban and recreational develop- shrubs commonly grown in the area are generally well ment. The chief limiting soil features are the loose, coarse suited to this soil. Cultivation to control competing textured soil, steep slopes, and rapid permeability. Capa- vegetation should be continued for as many years as possible following planting. Trees that are best suited and bility subclass VIIs irrigated, VIIs nonirrigated; Gravel have good survival are Rocky Mountain juniper, eastern .ks range site. I. redcedar, ponderosa pine, Siberian elm, Russian-olive, and 69 Valent sand, 0 to 3 percent slopes. This is a deep, ly hackberry. The shrubs best suited are skunkbush sumac, ssive t. drained soil on plains at elevations of 4,650 lilac, Siberian peashrub, and American plum. 5,100 feet. It formed in eolian deposits. Included in Wildlife is an important secondary use of this soil. The mapping are small areas of soils that have lime within a cropland areas provide favorable habitat for ring-necked depth of 40 inches. Typically the surface layer is brown sand about 8 pheasant and mourning dove. Many nongame species can inches thick. The underlying material to a depth of 60 be attracted by establishing areas for nesting and escape cover. For pheasants, undisturbed nesting cover is essen- inches is brown sand. tial and should be included in plans for habitat develop- moderate. The effective rooting depth is 60 inches or ment, especially in areas of intensive agriculture. Range- more. Surface runoff is slow, and the erosion hazard is land wildlife, for example, the pronghorn antelope, can be low attracted by developing livestock watering facilities, This soil is suited to limited cropping. Intensive managing livestock grazing, and reseeding where needed. cropping is hazardous because of erosion. The cropping This soil has poor potential for urban and recreational system should be limited to such close grown crops as al- development. Slow permeability and high shrink swell fella, wheat, and barley. The soil also is suited to ir- cause problems in dwelling and road construction. Capa- rigated pasture. A suitable cropping system is 3 to 4 bility subclass IUe irrigated, IVe nonirrigated; Clayey years of alfalfa followed by 2 years of corn and small Plains range site. ' grain and alfalfa seeded with a nurse crop. 68—Ustic Torriorthents, moderately steep. These are Closely spaced contour ditches or sprinkers can be used deep, excessively drained soils on terrace breaks and in irrigating close grown crops. Contour furrows or sprin- escarpments at elevations of 4,450 to 5,100 feet. They klers should be used for new crops. Applications of bar- formed in gravelly alluvium and have slopes of 9 to 25 nyard manure and commercial fertilizer help to maintain percent. Included in mapping are small areas of soils that good production. have pockets of sandy loam and loam in the underlying The potential vegetation is dominated by sand material. bluestem, sand Typically the surface layer is pale brownbluestem,tle sw and blue l sideoats grama, n- about 10 inches thick. The underlying material gravelly a depth tialdproductiondrangesfrom2500d grper acrePo in i of 60 inches is pale brown gravelly sand. pounds per in favorable years to 1,800 pounds in unfavorable years. A' r WELD COUNTY, COLORADO, SOUTHERN PART 45 range condition deteriorates, the sand bluestem, The potential vegetation is dominated by sand switchgrass, sand reedgrass, sideoats grama, and little bluestem, sand reedgrass, switchgrass, sideoats grama, bluestem decrease, forage production drops, and sand needleandthread, little bluestem, and blue grama. Pot sage increases. Undesirable weeds and annuals invade tial production ranges from 2,500 pounds per acre .. and "blowout" conditions can occur as range condition favorable years to 1,800 pounds in unfavorable years. As becomes poorer. range condition deteriorates, the sand bluestem, Management of vegetation on this soil should be based switchgrass, sand reedgrass, sideoats grama, and little on taking half and leaving half of the total annual produc- bluestem decrease, forage production drops, and sand tion. Seeding is desirable if the range is in poor condition. sage increases. Undesirable weeds and annuals invade Sand bluestem, sand reedgrass, indiangrass, switchgrass, and "blowout" conditions can occur as range condition sideoats grama, little bluestem, and blue grama are suita- becomes poorer. ble for seeding. Because this soil is susceptible to soil Management of vegetation on this soil should be based blowing, it should be seeded using an interseeder, or the on taking half and leaving half of the total annual produc- seed should be drilled into a firm, clean sorghum stubble. tion. Seeding is desirable if the range is in poor condition. Seeding early in spring has proven most successful. Brush Sand bluestem, sand reedgrass, indiangrass, switchgrass, management also can help in improving deteriorated side-oats grama, little bluestem, and blue grama are suita- range. ble for seeding. Because this soil is susceptible to soil Windbreaks and environmental plantings are fairly well blowing, it should be seeded using an interseeder or the suited to this soil. Blowing sand and the moderate availa- seed should be drilled into a firm, clean sorghum stubble. ble water capacity are the principal hazards in establish- Seeding early in spring has proven most successful. Brush ing trees and shrubs. The soil is so loose that trees should management can also help in improving deteriorated be planted in shallow furrows, maintaining vegetation range. between the rows. Supplemental irrigation is needed to Windbreaks and environmental plantings are generally insure survival. Trees that are best suited and have good not suited to this soil. Onsite investigation is needed to survival are Rocky Mountain juniper, eastern redcedar, determine if plantings are feasible. ponderosa pine, and Siberian elm. The shrubs best suited Wildlife is an important secondary use of this soil. Ran- are skunkbush sumac, lilac, and Siberian peashrub. geland wildlife, for example, the pronghorn antelope, can Wildlife is an important secondary use of this soil. The be attracted by developing livestock watering facilities, cropland areas provide favorable habitat for ring-necked managing livestock grazing, and reseeding where needed. pheasant and mourning dove. Many nongame species can This soil has fair potential for urban development. The be attracted by establishing areas for nesting and escape chief limiting soil features are the rapid permeability 2 cover. For pheasants, undisturbed nesting cover is essen- the susceptibility to soil blowing. Septic tank absorption tial and should be included in plans for habitat develop- fields function properly, but in places the sandy sub- ment, especially in areas of intensive agriculture. Range- stratum does not properly filter the leachate. Sewage land wildlife, for example, the pronghorn antelope, can be lagoons must be sealed. Once established, lawns, shrubs, attracted by developing livestock watering facilities, and trees grow well. Capability subclass Vie irrigated, managing livestock grazing, and reseeding where needed. Vie nonirrigated; Deep Sand range site. This soil has fair potential for urban development. The 71—Valent-Loup complex, 0 to 9 percent slopes. This primary limiting soil features are the rapid permeability level to moderately sloping map unit occupies hills, ridges, and the susceptibility to soil blowing. Septic tank absorp- and depression or pothole-like areas in the sandhills at tion fields function properly, but in places the sandy sub- elevations of 4,670 to 4,700 feet. The Valent soil makes up stratum does not properly filter the leachate. Sewage about 60 percent of the unit, the Loup soil about 35 per- lagoons must be sealed. Once established, the lawns, cent. About 5 percent is dune sand. The Valent soil occu- shrubs, and trees grow well. Capability subclass IVe ir- pies the hills and ridges and the Loup soil the depressions e., Vie nonirrigated; Deep Sand range site. or potholes. 70— alent sand, 3 to 9 percent slopes. This is a deep, The Valent soil is deep and excessively drained. It c-: ively drained soil on plains at elevations of 4,650 to formed in eolian deposits. Typically the surface layer is 5,100 feet. It formed in eolian deposits. Included in brown sand about 8 inches thick. The underlying material mapping are small areas of soils that have lime within a to a depth of 60 inches is brown sand. depth of 40 inches. Also included are small areas of soils Permeability is rapid. Available water capacity is that have sandstone between 40 and 60 inches. moderate. The effective rooting depth is 60 inches or Typically the surface layer of the Valent soil is brown more. Surface runoff is slow, and the erosion hazard is sand about 6 inches thick. The underlying material to a low. depth of 60 inches is brown sand. The Loup soil is deep and poorly drained. It formed in Permeability is rapid. Available water capacity is sandy alluvium. Typically the surface layer is very dark moderate. The effective rooting depth is 60 inches or grayish brown, mottled loamy sand about 16 inches thick. more. Surface runoff is slow, and the erosion hazard is The underlying material to a depth of 60 inches is light low' brownish gray, mottled loamy sand and sandy loam. Hello