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Home My WebLink About982555.tiff 50 SOIL SURVEY sugar beets, small grain, or beans. Few conservation prac- The potential native vegetation is dominated by blue tices are needed to maintain top yields. grama. Several mid grasses, such as western wheatgrass All methods of irrigation are suitable, but furrow ir- and needleandthread, are also present. Potential produc- rigation is the most common. Barnyard manure and com- tion ranges from 1,600 pounds per acre in favorable years mercial fertilizer are needed for top yields. to 1,000 pounds in unfavorable years. As range condition Windbreaks and environmental plantings generally are deteriorates, the mid grasses decrease; blue grama, buf- well suited to this soil. Summer fallow a year before falograss, snakeweed, yucca, and fringed sage increase; planting and continued cultivation for weed control are and forage production drops. Undesirable weeds and an- needed to insure establishment and survival of plantings. nuals invade the site as range condition becomes poorer. Trees that are best suited and have good survival are Management of vegetation on this soil should be based Rocky Mountain juniper, eastern redcedar, ponderosa on taking half and leaving half of the total annual produc- pine, Siberian elm, Russian-olive, and hackberry. The tion. Seeding is desirable if the range is in poor condition. shrubs best suited are skunkbush sumac, lilac, Siberian Sideoats grama, little bluestem, western wheatgrass, blue peashrub, and American plum. grama, pubescent wheatgrass, and crested wheatgrass are Openland wildlife, such as pheasant, mourning dove, suitable for seeding. The grass selected should meet the and cottontail, are best suited to this soil. Wildlife habitat seasonal requirements of livestock. It can be seeded into development, including tree and shrub plantings and a clean, firm sorghum stubble, or it can be drilled into a grass plantings to serve as nesting areas, should be suc- firm prepared seedbed. Seeding early in spring has cessful without irrigation in most years. Under irrigation, proven most successful. good wildlife habitat can be established, benefiting many Windbreaks and environmental plantings are generally kinds of openland wildlife. well suited to this soil. Summer fallow a year before This soil has good potential for urban and recreational planting and continued cultivation for weed control are development. The chief limiting soil features for urban needed to insure establishment and survival of plantings. development are the shrink-swell potential of the subsoil Trees that are best suited and have good survival are as it wets and dries and the limited capacity of the soil to Rocky Mountain juniper, eastern redcedar, ponderosa support a load. Lawns, shrubs, and trees grow well. Capa- pine, Siberian elm, Russian-olive, and hackberry. The bility class I irrigated. shrubs best suited are skunkbush sumac, lilac, Siberian 79—Weld loam, 1 to 3 percent slopes. This is a deep, peashrub, and American plum. well drained soil on smooth plains at elevations of 4,850 to Openland wildlife, such as pheasant, mourning dove, 5,000 feet. It formed in eolian deposits. Included in and cottontail, are best suited to this soil. Wildlife habitat mapping are small areas of soils that have a subsoil of development, including tree and shrub plantings and loam and light clay loam. Also included are some leveled grass plantings to serve as nesting areas, should be suc- areas. cessful without irrigation during most years. Under ir- Typically the surface layer of this Weld soil is brown rigation, good wildlife habitat can be established, benefit- loam about 8 inches thick. The subsoil is brown and pale ing many kinds of openland wildlife. brown heavy clay loam and light clay about 20 inches This soil has good potential for urban and recreational thick. The substratum to a depth of 60 inches is silt loam. development. The chief limiting soil features for urban Permeability is slow. Available water capacity is high. development are the shrink-swell potential of the subsoil The effective rooting depth is 60 inches or more. Surface as it wets and dries and the limited capacity of the soil to runoff is slow, and the erosion hazard is low. support a load. Lawns, shrubs, and trees grow well. Capa- In irrigated areas this soil is suited to all crops com- bility subclass Ile irrigated, tile nonirrigated; Loamy monly grown in the area, including corn, sugar beets (fig. Plains range site. 8), beans, alfalfa, small grain, and onions. An example of a 80—Weld loam, 3 to 5 percent slopes. This is a deep, suitable cropping system is 3 to 4 years of alfalfa fol- well drained soil on plains at elevations of 4,850 to 5,000 lowed by corn, corn for silage, sugar beets, small rain, or feet. It formed in eolian deposits. Included in mapping are beans. Land leveling, ditch lining, and installing pipelines small areas of soils that have a subsoil of loam and light are needed for proper water applications. clay loam. All methods of irrigation are suitable, but furrow ir- Typically the surface layer is brown loam about 8 rigation is the most common. Barnyard manure and com- inches thick. The subsoil is brown and pale brown heavy mercial fertilizer are needed for top yields. clay loam and light clay about 18 inches thick. The sub- This soil is well suited to winter wheat, barley, and stratum to a depth of 60 inches is silt loam. sorghum if it is summer fallowed in alternate years. Permeability is slow. Available water capacity is high. Winter wheat is the principal crop. The predicted average The effective rooting depth is 60 inches or more. Surface yield is 33 bushels per acre. If the crop is winterkilled, runoff is medium, and the erosion hazard is moderate. spring wheat can be seeded. Generally precipitation is too In irrigated areas this soil is suited to most of the crops low for beneficial use of fertilizer. commonly grown in the area, such as corn, alfalfa, wheat, Stubble mulch farming, striperopping, and minimum til- and barley. Sugar beets are often grown. The soil is lage are needed to control soil blowing and water erosion. suited to irrigated pasture. Ditch lining and installing Terracing also may be needed to control water erosion. pipelines are needed for proper water application. u 'y �I, �, 982555 �� , wG „m 14 SOIL SURVEY ing corn, sugar beets, beans, alfalfa, small grain, The potential native vegetation is dominated by blue potatotes, and onions. An example of a suitable cropping grama. Several mid grasses, such as western wheatgrass system is 3 to 4 years of alfalfa followed by corn, corn for and needleandthread, are also present. Potential produc- silage, sugar beets, small grain, or beans. Few conserva- tion ranges from 1,600 pounds per acre in favorable years tion practices are needed to maintain top yields. to 1,000 pounds in unfavorable years. As range condition All methods of irrigation are suitable, but furrow ir- deteriorates, the mid grasses decrease; blue grama, buf- rigation is the most common. Barnyard manure and corn- falograss, snakeweed, yucca, and fringed sage increase; mercial fertilizer are needed for top yields. and forage production drops. Undesirable weeds and an- Windbreaks and environmental plantings of trees and nuals invade the site as range condition becomes poorer. shrubs commonly grown in the area are generally well Management of vegetation on this soil should be based suited to this soil. Cultivation to control competing on taking half and leaving half of the total annual produc- vegetation should be continued for as many years as tion. Seeding is desirable if the range is in poor condition. possible following planting. Trees that are best suited and Sideoats grama, little bluestem, western wheatgrass, blue have good survival are Rocky Mountain juniper, eastern grama, pubescent wheatgrass, and crested wheatgrass are redcedar, ponderosa pine, Siberian elm, Russian-olive, and suitable for seeding. The grass selected should meet the hackberry. The shrubs best suited are skunkbush sumac, seasonal requirements of livestock. It can be seeded into lilac, Siberian peashrub, and American plum. a clean, firm sorghum stubble or it can be drilled into a Openland wildlife, such as pheasant, mourning dove, firm prepared seedbed. Seeding early in spring has and cottontail, are best suited to this soil. Wildlife habitat proven most successful. development, including tree and shrub plantings and Windbreaks and environmental plantings of trees and grass plantings to serve as nesting areas, should be suc- shrubs commonly grown in the area are generally well cessful without irrigation during most years. Under ir- suited to this soil. Cultivation to control competing rigation, good wildlife habitat can be established, benefit- vegetation should be continued for as many years as possible following planting. Trees that are best suited and ing many kinds of openland wildlife. This soil has good potential for urban and recreational have good survival are Rocky Mountain juniper, eastern redcedar, ponderosa pine, Siberian elm, Russian-olive, and developments. Road design can be modified to compen- sate for the limited capacity of this soil to support a load. hackberry. The shrubs best suited are skunkbush sumac, lilac, Siberian peashrub, and American plum. Capability class I irrigated. 15-Colby loam, 1 to 3 percent slopes. This is a deep, Openland wildlife, such as pheasant, mourning dove, well drained soil on uplands at elevations of 4,850 to 5,050 and cottontail, and rangeland wildlife, such as antelope, cottontail, and coyote, are best suited to this soil. Under feet. It formed in calcareous eolian deposits. Typically the surface layer is pale brown loam about 12 irrigation, good wildlife habitat can be established, inches thick. The underlying material is very pale brown benefiting many kinds of openland wildlife. Forage production is typically low on rangeland, and grazing silt loam to a depth of 60 inches. management is needed if livestock and wildlife share the Permeability is moderate. Available water capacity is range. Livestock watering facilities also are utilized by high. The effective rooting depth is 60 inches or more. Surface runoff is medium, and the erosion hazard is various wildlife species. moderate. This soil has good potential for urban and recreational development. Road design can be modified to compensate In irrigated areas this soil is suited to all crops com- for the monly grown in the area, including corn, sugar beets, limited capacity of this a soil to support a load. beans, alfalfa, small grain, potatoes, and onions. An exam- Capability subclass He irrigated, IVe nonirrigated; le of a suitable cropping Loamy Plains range site. P system is 3 to 4 years of alfalfa 16—Colby loam, 3 to 5 percent slopes. This is a deep, followed by corn, corn for silage, sugar beets, small grain, well drained soil on upland hills and ridges at elevations or beans. Land leveling, ditch lining, and installing of 4,850 to 5,050 feet. It formed in calcareous eolian pipelines may be needed for proper water application. deposits. Included in mapping are small areas of soils that All methods of irrigation are suitable, but furrow ir- have fine sandy loam or loam underlying material. rigation is the most common. Barnyard manure and corn- Typically the surface layer is pale brown loam about 10 mercial fertilizer are needed for top yields. inches thick. The underlying material is very pale brown silt loam In nonirrigated areas this soil is suited to winter wheat, y c to a depth of 60 inches. barley, and sorghum. Most of the acreage is planted to Permeability is moderate. Available water capacity is winter wheat. The predicted average yield is 28 bushels high. The effective rooting depth is 60 inches or more. per acre. The soil is summer fallowed in alternate years Surface runoff is medium to rapid, and the erosion hazard to allow moisture accumulation. Generally precipitation is is moderate. too low for beneficial use of fertilizer. In irrigated areas this soil is suited to crops commonly Stubble mulch farming, striperopping, and minimum til- grown in the area. Perennial grasses and alfalfa or close lage are needed to control soil blowing and water erosion. grown crops should be grown at least 50 percent of the Terracing may also be needed to control water erosion. time. Contour ditches and corrugations can be used in ir- i SHEET NO.32 WELD COUNTY,COLORADO, SOUTHERN PART (KEENESBURG QUADRANGLE) 104°30' ;tar i'f - ...: _ a I k I k,-- ' ;� `- mss �..,.�. 4Ite T ; x^�, v , -A)"_5 �' 40°0730.. X76 ' ..:. e*.'* 79 is m 79 i[ e a J 3 �• ;. .. .. - - dw. .:� ,16r" K � t 3 ..t 1::::::171.:17 4� 7 : cathL / ( \ .1..a., ‘tAl . i •jai! cs�l fir+ • # +.s 5�'+OF i~f'3'•, e. g .Y� i14I d t . • liZA• ri-,, .riii.„."--- - , 1 •.„ , ... .• ... .. _ .,,,,,..:. , . . :. . .., , a i• X. ". 'k «k. rid ,, y16 �' , .... ,.;,„...,;:.',-./.", POTENTIAL PRIME FARMLANDS WELD COUNTY, COLORADO, SOUTHERN PART • SOILS WITHIN THE FOLLOWING MAP UNITS ARE IDENTIFIED AS PRIME FARMLAND IF IRRIGATED WITH AN ADEQUATE SUPPLY OF WATER. FOOT- SYM- NOTE BOL MAP UNIT NAME * 1 ALTVAN LOAM, 0 TO 1 PCT SLOPES * 2 ALTVAN LOAM, 1 TO 3 PCT SLOPES * 5 ASCALON SANDY LOAM, 1 TO 3 PCT SLOPES 2* 6 ASCALON SANDY LOAM, 3 TO 5 PCT SLOPES * 9 ASCALON LOAM, 0 TO 1 PCT SLOPES * 9 ASCALON LOAM, 1 TO 3 PCT SLOPES * 11 BRESSER SANDY LOAM, 0 TO 1 PCT SLOPES * 12 BRESSER SANDY LOAM, 1 TO 3 PCT SLOPES 14 COLBY LOAM, 0 TO 1 PCT SLOPES 15 COLBY LOAM, 1 TO 3 PCT SLOPES * 19 COLOMBO CLAY LOAM, 0 TO 1 PCT SLOPES * 20 COLOMBO CLAY LOAM, 1 TO 3 PCT SLOPES * 21 DACONO CLAY LOAM, 0 TO 1 PCT SLOPES * 22 DACONO CLAY LOAM, 1 TO 3 PCT SLOPES 23 FORT COLLINS LOAM, 0 TO 1 PCT SLOPES 24 FORT COLLINS LOAM, 1 TO 3 PCT SLOPES 5 25 HAVERSON LOAM, 0 TO 1 PCT SLOPES 26 HAVERSON LOAM, 1 TO 3 PCT SLOPES 27 HELDT SILTY CLAY, 1 TO 3 PCT SLOPES * 29 JULESBURG SANDY LOAM, 0 TO 1 PCT SLOPES * 30 JULESBURG SANDY LOAM, 1 TO 3 PCT SLOPES 31 KIM LOAM, 0 TO 1 PCT SLOPES 32 KIM LOAM, 1 TO 3 PCT SLOPES * 39 NUNN LOAM, 0 TO 1 PCT SLOPES * 40 NUNN LOAM, 1 TO 3 PCT SLOPES * 41 NUNN CLAY LOAM, 0 TO 1 PCT SLOPES * 42 NUNN CLAY LOAM, 1 TO 3 PCT SLOPES 46 OLNEY FINE SANDY LOAM, 0 TO 1 PCT SLOPES 47 OLNEY FINE SANDY LOAM, 1 TO 3 PCT SLOPES 2 48 OLNEY FINE SANDY LOAM, 3 TO 5 PCT SLOPES 50 OTERO SANDY LOAM, 0 TO 1 PCT SLOPES 51 OTERO SANDY LOAM, 1 TO 3 PCT SLOPES 2 52 OTERO SANDY LOAM, 3 TO 5 PCT SLOPES * 54 PAOLI LOAM,. 0 TO 1 PCT SLOPES * 55 PAOLI LOAM, 1 TO 3 PCT SLOPES 66 ULM CLAY LOAM, 0 TO 3 PCT SLOPES 2 67 ULM CLAY LOAM, 3 TO 5 PCT SLOPES 75 VONA SANDY LOAM, 0 TO 1 PCT SLOPES 76 VONA SANDY LOAM, 1 TO 3 PCT SLOPES * 78 WELD LOAM, 0 TO 1 PCT SLOPES * 79 WELD LOAM, 1 TO 3 PCT SLOPES * 80 WELD LOAM, 3 TO 5 PCT SLOPES 81 WILEY-COLBY COMPLEX, 0 TO 1 PCT SLOPES 82 WILEY-COLBY COMPLEX, 1 TO 3 PCT SLOPES 2 83 WILEY—COLBY COMPLEX, 3 TO 5 PCT SLOPES (more) 61 • EXPLANATION OF FOOTNOTES Footnote Designation * Map unit qualifies as High Potential Dry Cropland. This is' a category of "Farmlands of Statewide Importance." ** The soil survey is not completed. The list of soils which meet the requirements for Prime Farmlands will be updated. 1 Portions of this map unit which have smooth, even slopes of less than 6 percent would qualify as Prime Farmland if Irrigated with an Adequate Supply of Water. 2 Small portions of this map unit may exceed the maximum allowable slope range for Prime Farmland or portions may occur on ridges where soil erosion criteria is exceeded. These areas would be excluded from Prime Farmland. 3 Portions of this map unit which have been drained and salinity reduced below a level of 4 mmhos/cm would be included in Prime Farmland. 4 This map unit occurs in areas where soils differ greatly over short distances. The map unit is defined too broadly to assign a Prime Farmland designation. Portions of the map unit may qualify as Prime Farmland. 5 Only those portions of the map unit which do not flood frequently are included in Prime Farmlands. 64 Hello