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<br />Weld County, Colorado, Northern Part
<br />
<br />inches. Included areas make up about 10 percent of the
<br />total acreage.
<br />Permeability of this Manter soil is moderately rapid to
<br />a depth of 28 inches and rapid below this depth.
<br />Available water capacity is moderate. Effective rooting
<br />depth is 60 inches or more. Runoff is slow, and the
<br />hazard of water erosion is high. The hazard of soil
<br />blowing is moderate.
<br />This unit is used as rangeland.
<br />The potential plant community on this unit is mainly
<br />blue grama, needleandthread, prairie sandreed, and sand
<br />dropseed. The average annual production of air-dry
<br />vegetation ranges from 700 to 1,800 pounds.
<br />. If the range is overgrazed, the proportion of preferred
<br />forage plants decreases and the proportion of less
<br />preferred forage plants increases. Therefore, livestock
<br />grazing should be managed so that the desired balance
<br />of preferred species is maintained in the plant
<br />community.
<br />Range seeding is suitable if the range is in poor
<br />condition. The plants selected for seeding should meet
<br />the seasonal requirements of livestock or wildlife, or
<br />both. Other management practices that are suitable for
<br />use on this unit are proper range use, deferred grazing,
<br />and rotation grazing. If the plant cover is disturbed,
<br />protection from erosion is needed. Loss of the surface
<br />layer results in a severe decrease in productivity and in
<br />the potential of the soil to produce plants suitable for
<br />grazing.
<br />This unit is well suited to windbreaks and
<br />environmental plantings. It Is limited mainly by the hazard
<br />Of soil blowing where the soil is barren of vegetation.
<br />Supplemental irrigation may be needed when planting
<br />and during dry periods. Summer fallow, cultivation fer
<br />weed control, and selection of adapted plants are
<br />needed to insure establishment and survival of
<br />seedlings.
<br />This map unit is in capability subclass Vie,
<br />nonirrigated, and in Sandy Plains range site.
<br />
<br />36-Manzanola clay loam, 0 to 3 percent slopes.
<br />This deep, well drained soil is on plains, in swales, and
<br />on adjacent stream terraces. It formed in calcareaus
<br />clayey alluvium. Slopes are plane or concave.
<br />Typically, the surface layer is grayish brown heavy clay
<br />loam 3 inches thick. The subsoil is calcareaus clay 22 .
<br />inches thick. The substratum to a depth of 60 inches or
<br />more is calcareous clay and clay loam.
<br />Included in this unit are small areas of Avar fine sandy
<br />loam and soils that have a sodium content of more than
<br />15 percent. Included areas make up about 15 percent of
<br />the total acreage.
<br />Permeability of this Manzanola soil is slow. Available
<br />water capacity is high. Effective rooting depth is 60
<br />inches or more. Runoff is medium to slow, and the
<br />hazard of water erosion is slight. The hazard of soil
<br />blowing is moderate.
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<br />
<br />Most areas of this unit are used as rangeland. A few
<br />areas are used as nonirrigated cropland. Winter wheat is
<br />the main crop.
<br />The potential plant community on this unit is mainly
<br />blue grama. western wheatgrass, and fourwing saltbush.
<br />The average annuai production of air-dry vegetation
<br />ranges from 500 to 1,200 pounds. .
<br />If the range is overgrazed, the proportion of preferred
<br />forage plants decreases and the proportion of less
<br />preferred forage plants increases. Therefore, livestock
<br />grazing should be managed so that the desired balance
<br />of preferred species is maintained in the plant
<br />community.
<br />Range seeding is suitable if the 'range is in poor
<br />condition. The plants selected for seeding should meet
<br />the seasonal requirements of livestock or wildlife, or
<br />both. Other management practices that are suitable for
<br />use on this unit are proper range use, deferred grazing,
<br />and rotation grazing. Livestock grazing should be
<br />managed to protect the soil in this unit from erosion.
<br />This unit is suited to winter wheat, barley, oats, and
<br />sorghum. Because precipitation is not sufficient for
<br />annual cropping, a cropping system that includes small
<br />grain and summer fallow is most suitable. Precipitation
<br />usually is too low for crops on this unit to make efficient
<br />use of fertilizer.
<br />Maintaining crop residue on or near the surface
<br />reduces soil blowing and helps to maintain soil tilth and
<br />organic matter ccntent. Stubble-mulch farming,
<br />stripcropping, and minimum tillage help to control erosion
<br />and conserve moisture. Terraces reduce runoff and the
<br />risk of erosion and help to conserve moisture.
<br />This unit is well suited to windbreaks and
<br />environmental plantings. It has few limitations.
<br />Supplemental irrigation may be needed when planting
<br />and during dry periods. Summer fallow, cultivation for
<br />weed control, and selection of adapted plants are
<br />needed to insure astablishment and survival of
<br />seedlings.
<br />This map unit is in capability subclass IVe,
<br />nonirrigated, and in Clayey Plains range site.
<br />
<br />37-Mldway clay loam, 0 to 9 percent slopes. This
<br />shallow, well drained soil is on slightly dissected to highly
<br />dissected plains, breaks, and upland ridges. It formed in
<br />calcareaus clayey residuum derived from shale.
<br />Typically, the surface layer is grayish brown clay loam
<br />3 inches thick. Below this is calcareaus clay 8 inches
<br />thick. Shale is at a depth of 11 inches. Depth tc shale
<br />ranges from 10 to 20 inches.
<br />Included in this unit are small areas of Renohiilfine
<br />sandy loam. Rock outcrop of shale, and areas of soils
<br />that are ponded intermittently. Included areas make up
<br />about 20 percent of the total acreage.
<br />Permeability of this Midway soil is slow. Available
<br />water capacity is low. Effective rooting depth is 10 to 20
<br />inches. Runoff is medium to rapid, and the hazard of
<br />water erosion is slight to very high. The hazard of soil
<br />blowing is moderate.
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