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Home My WebLink About981092.tiff .` Vii. y tza ,:.... �„ ....A PCf�. a w,... 4 Ate'Ialle � ,• .y ,yr + ;i s y:. , 4q` `'' '''''es' m N F N F : 771l! C af, , %p) um41 t 1 i '� � r xis et Vx�� £ ; mF N 41 m rvr 5 -Y .1' Yq -.wyz, k N -, C7+fgr .# r--J I , a. ..'"' sc ... . ...,� ..... ,..._L... 1 .,,t ' Y 'f+= •"� .yj� ry t v rd's ,,,,.,”,‘,4,... ,; .- -. '` Q _' e ros r mgr it,046 ,,•41,i�wl JF/ :::'• 4 / a .t 7' *.a ter!tikr r t k .' r • Y r F e m m' a s'.+alr sct' fi r .` P AJ N I enni �, Wsr , a'4 qy ,iL•+,�i?..e ' S .• '!Au. Z` 1 t Y.: ,DY ,4 of m +a. t tK. x �y: • •_'-: ,.(mac. rc y se iW ^' .; \ CN5� • . Ea:. ':vim �► �J.rsM g Y^ ilk \I t): 981092 04. g 16 SOIL SURVEY management is needed if livestock and wildlife share the ments of livestock. It can be seeded into a clean, firm range. Livestock watering facilities also are utilized by sorghum stubble, or it can be drilled into a firm prepared various wildlife species. seedbed. Plowing and drilling should be on the contour to This soil has good potential for urban and recreational minimize runoff and soil losses. Seeding early in spring developments. Road design can be modified to compen- has proven most successsful. Capability subclass IVe sate for the limited capacity of this soil to support a load. nonirrigated; Colby soil in Loamy Slopes range site, Capability subclass IVe irrigated, VIe nonirrigated; Adena soil in Loamy Plains range site. Loamy Slopes range site. 19—Colombo clay loam, 0 to 1 percent slopes. This is 18—Colby-Adena loams, 3 to 9 percent slopes. These a deep, well drained soil on flood plains and terraces at gently sloping to moderately sloping soils are on plains, elevations of 4,600 to 4,780 feet. It formed in stratified hills, and ridges at elevations of 4,750 to 4,900 feet. The calcareous alluvium. Included in mapping are small areas Colby soil, which makes up about 55 percent of the map of soils that have a loam surface layer and some small unit, occupies the steeper, convex parts of the landscape. leveled areas. The Adena soil, about 30 percent of the unit, occupies the Typically the surface layer of this Colombo soil is dark less steep, slightly concave parts. About 15 percent is grayish brown clay loam about 14 inches thick. The upper Kim loam and Weld loam. 7 inches of the underlying material is pale brown The Colby soil is deep and well drained. It formed in stratified clay loam and loam. The lower part to a depth calcareous eolian deposits. Typically the surface layer is of 60 inches is very pale brown loam stratified with thin pale brown loam about 7 inches thick. The underlying lenses of fine sand, medium sand, and clay loam. material to a depth of 60 inches is very pale brown silt Permeability is moderate. Available water capacity is loam. high. The effective rooting depth is 60 inches or more. Permeability is moderate. Available water capacity is Surface runoff is slow, and the erosion hazard is low. high. The effective rooting depth is 60 inches or more. In irrigated areas this soil is suited to crops commonly Surface runoff is rapid, and the erosion hazard is high. grown in the area, such as corn, sugar beets, beans, alfal- The Adena soil also is deep and well drained and fa, onions, and potatoes. formed in calcareous eolian deposits. Typically the surface All methods of irrigation that are common to the area layer is brown loam about 6 inches thick. The subsoil is are used. Borders are suitable for small grain, alfalfa, and brown and very pale brown clay loam about 3 inches pasture. Furrow irrigation is used for row crops. Crops thick. The substratum to a depth of 60 inches is very pale respond to application of nitrogen and phosphorus. brown silt loam. Windbreaks and environmental plantings of trees and Permeability is slow. Available water capacity is high. shrubs commonly grown in the area are generally well The effective rooting depth is 60 inches or more. Surface suited to this soil. Cultivation to control competing runoff is medium, and the erosion hazard is moderate. vegetation should be continued for as many years as This unit is used for nonirrigated cropland and range- possible following planting. Trees that are best suited and land. It is suited to winter wheat, barley, and sorghum. have good survival are Rocky Mountain juniper, eastern Most of the acreage is planted to winter wheat and is redcedar, ponderosa pine, Siberian elm, Russianolive, and summer fallowed in alternate years to allow moisture ac- hackberry. The shrubs best suited are skunkbush sumac, cumulation. Generally precipitation is too low for benefi- lilac, Siberian peashrub, and American plum. cial use of fertilizer. Wildlife is an important secondary use of this soil. Stubble mulch fanning, striperopping, and minimum til- Ring-necked pheasant, mourning dove, and many non- lage are needed to control soil blowing and water erosion. game species can be attracted by establishing areas for Terracing also may be needed to control water erosion. nesting and escape cover. For pheasants, undisturbed The potential native vegetation on this unit is nesting cover is essential and should be included in plans dominated by blue grama. Sideoats grama, little bluestem, for habitat development, especially in areas of intensive and western wheatgrass are also prominent. Potential agriculture. production ranges from 1,800 pounds per acre in favora- Where this soil is on flood plains and is susceptible to ble years to 1,100 pounds in unfavorable years. As range flooding it has poor potential for urban and recreational condition deteriorates, the sideoats grama and little development. On the higher terraces the potential is fair. bluestem decrease, forage production drops, and blue Dwelling and road designs need to be modified to in- grama, buffalograss, and several perennial forbs and crease the capacity of the soil to support a load and to shrubs increase. Undesirable weeds and annuals invade protect it against frost action. Capability subclass IIw ir- the site as range condition becomes poorer. rigated. Management should be based on taking half and leaving 20—Colombo clay loam, 1 to 3 percent slopes. This is half of the total annual production. Seeding is desirable if a deep, well drained soil on flood plains and terraces at the range is in poor condition. Sideoats grama, little elevations of 4,600 and 4,780 feet. It formed in stratified bluestem, western wheatgrass, bluegrama, pubescent calcareous alluvium. Included in mapping are small areas wheatgrass, and crested wheatgrass are suitable for seed- of soils that have a loam surface layer. Some small ing. The grass selected should meet the seasonal require- leveled areas are also included. 981.092 LD COUNTY, COLORADO, SOUTHERN PAR 17 Typically the surface layer of this Colombo soil is dark Wildlife is an important secondary use of this soil. The grayish brown clay loam about 14 inches thick. The upper cropland areas provide favorable habitat for ring-necked 7 inches of the underlying material is pale brown pheasant and mourning dove. Many nongame species can stratified clay loam and loam. The lower part to a depth be attracted by establishing areas for nesting and escape of 60 inches is very pale brown loam stratified with thin cover. For pheasants, undisturbed nesting cover is essen- lenses of fine sand, medium sand, and clay loam. tial and should be included in plans for habitat develop- Permeability is moderate. Available water capacity is ment, especially in areas of intensive agriculture. Range- high. The effective rooting depth is 60 inches or more. land wildlife, for example, the pronghorn antelope, can be i Surface runoff is medium, and the erosion hazard is low. attracted by developing livestock watering facilities, i In irrigated areas this soil is suited to all crops com- managing livestock grazing, and reseeding where needed. a monly grown in the area, including corn, sugar beets, Where this soil is on flood plains and is susceptible to beans, alfalfa, small grain, potatoes, and onions. An exam- flooding, it has poor potential for urban and recreational pie of a suitable cropping system is 3 to 4 years of alfalfa development. On the higher terraces, potential is fair. Dwelling and road designs may need to be modified to followed by corn, corn for silage, sugar beets, small grain, compensate for the limited capacity of this soil to support or beans. Land leveling, ditch lining, and installing a load and to protect it against frost action. Capability pipelines may be needed for proper water application. All methods of irrigation are suitable, but furrow ir- subclass Ile irrigated, IIIe nonirrigated; Clayey Plains Ilf� range site. 21—Dacono clay loam, 0 to 1 percent slopes. This is a rigation is the most common. Barnyard manure and com- mercial fertilizer are needed for top yields. deep, well drained soil on terraces at elevations of 4,550 In nonirrigated areas this soil is well suited to winter to 4,970 feet. It formed in mixed alluvium. Included in wheat, barley, and sorghum if it is summer fallowed in al- mapping are small, long and narrow areas of sand and ternate years. Winter wheat is the principal crop. The gravel deposits and some small leveled areas. predicted average yield is 33 bushels per acre. If the crop Typically the surface layer of this Dacono soil is gray- is winterkilled, spring wheat can be seeded. Generally ish brown clay loam about 12 inches thick. The subsoil is 4 precipitation is too low for beneficial use of fertilizer. grayish brown clay loam about 15 inches thick. The sub- Stubble mulch fanning, striperopping, and minimum til- stratum is very gravelly sand. lage are needed to control soil blowing and water erosion. Permeability is moderately slow. Available water E Terracing also may be needed to control water erosion. capacity is moderate. The effective rooting depth is 20 to The potential native vegetation is dominated by 40 inches. Surface runoff is slow, and the erosion hazard western wheatgrass. Blue grama, switchgrass, sand is low. i reedgrass, big bluestem, slender wheatgrass, indiangrass, This soil is used almost entirely for irrigated crops. It and green needlegrass are also present. Potential produc- is suited to all crops commonly grown in the area, includ- 4 tion ranges from 1,000 pounds per acre in favorable years ing corn, sugar beets, beans, alfalfa, small grain, potatoes, to 600 pounds in unfavorable years. As range condition and onions. An example of a suitable cropping system is 3 deteriorates, the tall grasses decrease, blue grams and to 4 years of alfalfa followed by corn, corn for silage, buffalograss increase, and forage production drops. Un- sugar beets, small grain, or beans. Generally, such charac- desirable weeds and annuals invade the site and erosion teristics as a high clay content or a rapidly permeable can occur as range condition becomes poorer. substratum slightly restrict some crops. Management of vegetation on this soil should be based All methods of irrigation are suitable, but furrow ir- on taking half and leaving half of the total annual produc- management is essential. Barnyard manure and commer- rigation is the most common. Proper irrigation water tion. Seeding is desirable if the range is in poor condition. Western wheatgrass, switchgrass, sand reedgrass, cial fertilizer are needed for top yields. Windbreaks and environmental plantings of trees and sideoats grama, pubescent wheatgrass, intermediate wheatgrass, and blue grama are suitable for seeding. The shrubs commonly grown in the area are generally well suited to this soil. Cultivation to control competing grass selected should meet the seasonal requirements of vegetation should be continued for as many years as livestock. It can be seeded into a firm prepared seedbed. possible following planting. Trees that are best suited and A grass drill should be used. Seeding early in spring has have good survival are Rocky Mountain juniper, eastern proven most successful. redeedar, ponderosa pine, Siberian elm, Russian-olive, and Windbreaks and environmental plantings of trees and hackberry. The shrubs best suited are skunkbush sumac, shrubs commonly grown in the area are generally well lilac, Siberian peashrub, and American plum. suited to this soil. Cultivation to control competing Openland wildlife, such as pheasant, mourning dove, vegetation should be continued for as many years as and cottontail are best suited to this soil. Wildlife habitat possible following planting. Trees that are best suited and development, including tree and shrub plantings and have good survival are Rocky Mountain juniper, eastern grass plantings to serve as nesting areas, should be suc- redcedar, ponderosa pine, Siberian elm, Russian-olive, and cessful without irrigation during most years. Under ir- hackberry. The shrubs best suited are skunkbush sumac, rigation, good wildlife habitat can be established, benefit- lilac, Siberian peashrub, and American plum. ing,many kinds of openland wildlife. 991092 r WELD COUNTY, COLORADO, SOUTHERN PART 1 i TABLE 9.--WATER MANAGEMENT--Continued I Soil name and Pond I Embankments, Drainage I Irrigation Terraces I Grassed map symbol reservoir dikes, and and I waterway areas levees diversions I 40 Favorable Compressible, Percs slowly, Percs slowly, Peres slowly--- Favorable. Nunn shrink-swell, slope. slope. hard to pack. 41 Favorable Compressible, Percs slowly--- Percs slowly--- Percs slowly--- Favorable. Nunn shrink-swell, hard to pack. 42 Favorable Compressible, Peres slowly, Percs slowly, Peres slowly--- Favorable. Nunn shrink-swell, slope. slope. hard to pack. 43 Favorable Compressible, Percs slowly--- Percs slowly--- Percs slowly--- Favorable. Nunn shrink-swell, hard to pack. 44 Seepage, Piping, Slope Soil blowing, Erodes easily, Erodes easi- Olney slope. low strength. droughty. piping. 45 Seepage, Piping, Slope Soil blowing, Erodes easily, Erodes easi: Olney slope. low strength. droughty, piping. slope. 46 Seepage, Piping, Favorable Favorable Erodes easily, Erodes easi] Olney slope, low strength. piping. 47, 48 ;Seepage, Piping, Slope Slope, Erodes easily, Erodes easi] Olney : slope. low strength. erodes easily. piping. 49 ;Seepage Piping Favorable Soil blowing--- Too sandy, Erodes easil Osgood piping. 50 Seepage Piping, Favorable Droughty Erodes easily, Erodes easil Otero seepage. piping. 51 , 52, 53 Seepage, Piping, Slope Slope, Erodes easily, Erodes easil Otero slope. seepage. erodes easily, piping. droughty. 54 Seepage Piping, Favorable Favorable Piping Favorable. Paoli low strength. 55 Seepage Piping, Slope Slope Piping Favorable. Paoli low strength. 56 Depth to rock Low strength, Depth to rock, Rooting depth, Depth to rock, Rooting dept Renohill thin layer, percs slowly . slow intake. percs slowly. percs slowl compressible. 57 Slope, Low strength, Slope, Slope, Depth to rock, Rooting dept Renohill depth to rock. thin layer, depth to rock, rooting depth, percs slowly. percs slowl compressible. percs slowly. slow intake. 58, 59 Slope, Low strength, Depth to rock, Slope, Depth to rock Rooting dept Shingle depth to rock. thin layer. slope. rooting depth. 60*: Shingle Slope, Low strength, Depth to rock, Slope, Depth to rock Rooting dept) depth to rock. thin layer. slope. rooting depth. Renohill Slope, Low strength, Slope, Slope, Depth to rock, Rooting dept) depth to rock. thin layer, depth to rock, rooting depth, percs slowly. percs slowl: compressible. percs slowly. slow intake. 61 Depth to rock, Erodes easily, Not needed Droughty, Depth to rock, Rooting deptt Tassel slope. thin layer. rooting depth. erodes easily. erodes easi: 62 Depth to rock, Piping, Slope, Slope, Depth to rock, Rooting deptt Terry seepage. thin layer. rooting depth. rooting depth, piping, soil blowini soil blowing. soil blowing. 99 See footnote at end of table. 1.092 v . Hello