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Home My WebLink About20043137.tiff S t # • ya r 11 ii 79 o iii. __or ,r-„,... , �f '"' 7. tea 7 1, 4 , , ,, .. 4 4P:1?' /Am '' k)‘` '''''4 .iink, :.*It ' 1 %-. '- 4' e.:.'i jawx xt 7�^Si ..:�. I N �- � f� Je9 v4, -+-�5 q r A � alf , s x r` n ii , 9�� cot l! ii _ ` 16 } r F iFh I Gay §ate y " + uFS x v s „b ti4 ��4- v - 44 R •'�a .mss r7 a rte } 1 4 S * L Ai! :E' y pp 1 M� a�a't, a.. 41 4 Y It 1 1 fax` 4 d .Ski` -...f'� `'. _1/2 Jr � .r C'� ._r t 777 34 y.a :}a `ir,(....i - i .,t .., e itt.hpoilit 4 W ffffF Yi ° r. 4 i-31 a wt � '' Qfe 79 c t u' t .^ 3` .a.�,a' 3 � t38 / Z Y c ' rsx.c 2004-3137 IF 3e it.:: % REa . �� SOIL SURVEY 40—Nunn loam, 1 to 3 percent slopes. This is a deep, vegetation should be continued for as many years as well drained soil on terraces at elevations of 4,550 to 5,000 possible following planting. Trees that are best suited and feet. It formed in mixed alluvium. Included in mapping have good survival are Rocky Mountain juniper, eastern are small, long and narrow areas of sand and gravel redcedar, ponderosa pine, Siberian elm, Russian-olive, and deposits and small areas of soils that are subject to occa- hackberry. The shrubs best suited are skunkbush sumac, 'clonal flooding. Some leveled areas are also included. lilac, Siberian peashrub, and American plum. Typically the surface layer of this Nunn soil is grayish Wildlife is an important secondary use of this soil. The brown loam about 12 inches thick. The subsoil is light cropland areas provide favorable habitat for ring-necked brownish gray clay loam about 12 inches thick. The upper pheasant and mourning dove. Many nongame species can part of the substratum is light brownish gray clay loam. be attracted by establishing areas for nesting and escape The lower part to a depth of 60 inches is brown sandy cover. For pheasants, undisturbed nesting cover is essen- loam. tial and should be included in plans for habitat develop- Permeability is moderately slow. Available water ment, especially in areas of intensive agriculture. Range- capacity is high. The effective rooting depth is 60 inches land wildlife, for example, the pronghorn antelope, can be or more. Surface runoff is medium, and the erosion attracted by developing livestock watering facilities, hazard is low. managing livestock grazing, and reseeding where needed. In irrigated areas this soil is suited to all crops com- This soil has fair to poor potential for urban develop- monly grown in the area, including corn, sugar beets, ment. It has moderate to high shrink swell, low strength, beans, alfalfa, small grain, potatoes, and onions. An exam- and moderately slow permeability. These features create ple of a suitable cropping system is 3 to 4 years of alfalfa problems in dwelling and road construction. Those areas followed by corn, corn for silage, sugar beets, small grain, that have loam or sandy loam in the lower part of the or beans. Generally such characteristics as a high clay substratum are suitable for septic tank absorption fields content or a rapidly permeable substratum slightly and foundations. Some areas of this soil are adjacent to restrict some crops. streams and are subject to occasional flooding. The poten- All methods of irrigation are suitable, but furrow ir- tial is fair for such recreational development as camp and rigation is the most common. Proper irrigation water picnic areas and playgrounds. Capability subclass IIe ir- management is essential. Barnyard manure and commer- rigated, Inc nonirrigated; Loamy Plains range site. cial fertilizer are needed for top yields. 41—Nunn clay loam, 0 to 1 percent slopes. This is a Most nonirrigated areas are used for small grain. Thep-deep, well drained soil on terraces and smooth plains at soil is summer fallowed in alternate years. Winter wheat elevations of 4,550 to 5,150 feet. It formed in mixed allu- is the principal crop. If the crop is winterkilled, spring vium and eolian deposits. Included in mapping are small, wheat can be seeded. Generally precipitation is too low long and narrow areas of sand and gravel deposits and for beneficial use of fertilizer. small areas of soils that are subject to occasional flooding. Such practices as stubble mulch farming, striperopping, Some small leveled areas are also included. and minimum tillage are needed to control soil blowing Typically the surface layer of this Nunn soil is grayish and water erosion. brown clay loam about 9 inches thick. The subsoil is light The potential native vegetation is dominated by blue brownish gray clay loam about 14 inches thick. The upper grams. Several mid grasses, such as western wheatgrass part of the substratum is clay loam. The lower part to a and needleandthread, are also present. Potential produc- depth of 60 inches is sandy loam. tion ranges from 1,600 pounds per acre in favorable years Permeability is moderately slow. Available water to 1,000 pounds in unfavorable years. As range condition capacity is high. The effective rooting depth is 60 inches deteriorates, the mid grasses decrease; blue grams, buf- or more. Surface runoff is slow, and the erosion hazard is falograss, snakeweed, yucca, and fringed sage increase; low. and forage production drops. Undesirable weeds and an- This soil is used almost entirely for irrigated crops. It nuals invade the site as range condition becomes poorer. is suited to all crops commonly grown in the area, includ- Management of vegetation on this soil should be based ing con, sugar beets, beans, alfalfa, small grain, potatoes, on taking half and leaving half of the total annual produc- and onions. An example of a suitable cropping system is 3 tion. Seeding is desirable if the range is in poor condition, to 4 years of alfalfa followed by corn, con for silage, Sideoats grama, little bluestem, western wheatgrass, blue sugar beets, small grain, or beans. Few conservation prac- grama, pubescent wheatgrass, and crested wheatgrass are tices are needed to maintain top yields. suitable for seeding. The grass selected should meet the All methods of irrigation are suitable, but furrow ir- seasonal requirements of livestock. It can be seeded into rigation is the most common. Barnyard manure and com- a clean, firm sorghum stubble, or it can be drilled into a mercial fertilizer are needed for top yields. firm prepared seedbed. Seeding early in spring has Windbreaks and environmental plantings of trees and proven most successful. shrubs commonly grown in the area are generally well Windbreaks and environmental plantings of trees and suited to this soil. Cultivation to control competing shrubs commonly grown in the area are generally well vegetation should be continued for as many years as suited to this soil. Cultivation to control competing possible following planting. Trees that are best suited and . WELD COUNTY, COLORADO, SOUTHERN PART 29 have good survival are Rocky Mountain juniper, eastern The potential native vegetation is dominated by *cedar, ponderosa pine, Siberian elm, Russian-olive, and western wheatgrass and blue grama. Buffalograss is also :berry. The shrubs best suited are skunkbush sumac, present. Potential production ranges from 1,000 pounds iliac, 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 poor condition. Western This soil has fair to poor potential for urban develop- wheatgrass, blue grama, sideoats grama, buffalograss, pu- ment. It has moderate to high shrink swell, low strength, bescent wheatgrass, and crested wheatgrass are 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 .3-.'own clay loam aobut 9 inches thick. The subsoil is light be attracted by establishing areas for nesting and escape ,wnish 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 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 playgrounds. Capability subclass IIe ir- All methods of irrigation are suitable, but furrow ir- rigated, IIIc nonirrigated; Clayey Plains range site. 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. 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 Stubble mulch fanning, striperopping, and minimum til- inches thick. The substratum to a depth of 60 inches is It are needed to control soil blowing and water erosion. loamy very fine sand, loamy sand, or sand. Hello