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<br />29-Haveraon loam, 0 to 3 percent slopes. This
<br />deep, well drained soli is on flood plains and adjacent
<br />stream terraces. It formed in stratified, calcareous, loamy
<br />alluvium.
<br />Typically, the surtace layer is pale brown and light
<br />brownish gray loam t2 inches thick. The underlvino
<br />material to a depth of 60 inches or more is very tine
<br />sandy loam and loam stratified with thin lenses o' sand,
<br />loamy sand, and clay loam. The soil is calcareous
<br />throughout.
<br />Included in this unit are small areas of Nunn loam and
<br />Nunn clay loam.
<br />Permeability of this Haverson soil is moderate.
<br />Available water capacity is high. Effective rooting depth
<br />is 60 inches or more. Runoff is slow to medium. and the
<br />hazarc o' water erosion is 56gnt. Tne hazartl o1 soil
<br />blowing is moderate. This soil is subject to brief periods
<br />o' flocdir_ it spring ar summer.
<br />Most areas of this unit are used as rangeland. A few
<br />areas are used as nonirrigated cropland. 1h'inter wheat is
<br />the main Crop.
<br />Tne potential plant community on this unit is mainly
<br />western wheatgrass, tourwing saltbush, switchorass,
<br />green needlegrass, and blue grams. The average annual
<br />production of air-dry vegetation ranges from 1,000 to
<br />3,500 pounds.
<br />li the range is overgrazed, the proportion of preferred
<br />forage Dlants 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. Range seeding is suitable if the range is in
<br />poor condition. The plants selected for seeding should
<br />meet the seasonal requirements of livestock or wildlife,
<br />or both. Other management practices that are suitable
<br />for use on this unit are proper range use, deferred
<br />grazing, and rotation grazing. If the plant cover is
<br />disturbed, protection from erosion is needed. Loss of the
<br />surtace layer results in a severe decrease in productivity
<br />and in the potential of the soil to produce plants suitable
<br />for grazing.
<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 filth and
<br />organic matter content. 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 />Thrs unit is well suited to windbreaks and
<br />environmental plantings. It is limited mainly by brief
<br />periods of flooding. Supplemental irrigation may be
<br />needed when planting and during dry periods.
<br />This map urnt is In capability subclass IVe,
<br />nonirrigated, and in Overtlow range site.
<br />40-Nunn loam, 0 to 6 percent slopes. Thrs seep.
<br />well drained soil is on slightly dissected plains and
<br />stream terraces. It formed in calcareous loamy alluvium
<br />Typically, [he surface layer rs grayish brown loam 7
<br />inches thick. The subsoil is clay loam 25 inches thick.
<br />The substatum is a depin of 60 inches or more is
<br />calcareous clay loam. In some areas the surtace laver is
<br />clay loam.
<br />Included in this unit are small areas of Avar tine sandy
<br />loam and Manzenola clay loam.
<br />Permeabillty of this Nunn soil is slow. Available water
<br />capacity rs hign. Effective rooting depth is 60 inches or
<br />more Runoff is medum, and the hazard of water erosion
<br />rs slight to moderate. The hazard of soil blowinc is shgn:
<br />This un~: is usee as non~rngatee cropland antl
<br />rangeland. Winter wheat Is the main Crop.
<br />This unC is sutler tc wir.:er wnea:, Caney, oats, ano
<br />sorghum. Low annual precipitation ~s the main limitation.
<br />Because precpitaton is no: sufficient for annual
<br />cropping, a croppmo system that includes sm=_~' c•2i~
<br />and sucrr,ar iai~ow is most suitable. Precipitation usually
<br />rs too low for crops on this unit to make efficient use o`.
<br />fertilizer.
<br />Maintaining crop residue or. or near the surtace
<br />reduces runoff, reduces soil blowing, and helps to
<br />mai-:fiiG soil filth and organic matter content. Stubble-
<br />mulch farming, stripcropping. and minimum tillage help tc
<br />control erosion and conserve moisture. Terraces reduce
<br />runoff and the risk of erosion and help to conserve
<br />moisture.
<br />The potential plant community on this unit is mainly
<br />blue grams, western wheatgrass, sedges, and
<br />buffalograss. The averaee annual production of air-dry
<br />vegetation ranges from 500 to 1,500 pounds.
<br />It the range is overgrazed, the proDorion Of preferred
<br />forage plants decreases and the proportion of less
<br />preferred forage plants increases. Therefore, Irvestock
<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 ranee 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 crazing,
<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 />Thls unit is well suited to windbreaks and
<br />environmental plantings. Supplemental irrigation may be
<br />needed when planting and durinc dry periods.
<br />This map unit is in capability subclass IVe,
<br />nonirrigated, and in Loamy Plains range site.
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