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.. .�.....'�_v' .q,•>,. �.w•^1.s.`-`_..'�.-r..'Ti}`��'R'�'�.`�..�'r.:_f.ww�.y::�-�i:.`d.. :..�...1,•..��..,,.w,.Y.,....,-'er.'�f°�w-„'•�`._.;+Yy"v-rr r.y,._. , .. .-- <br /> 2.0 4.9 <br /> Page 33 of 46 <br /> Water should be applied in sufficient amounts to wet the root zone but <br /> I in amounts small enough to minimize leaching of plant nutrients . Use of <br /> nitrogen and phosphorus fertilizer promotes good growth of forage plants . <br /> Proper stocking rates, 'pasture rotation, and restricted grazing during <br /> wet periods helps to keep the pasture in good condition and to protect <br /> the soil from erosion. ; Steeper areas of this unit are not suited for <br /> irrigation systems . If properly managed this unit can produce 4 tons <br /> of irrigated grass hay per acre. <br /> The potential plant community is mainly western wheatgrass , blue <br /> grama, and Junegrass. Other Jess numerous plants that characterize <br /> this unit are native bluegrass, green needlegrass , and little bluestem. <br /> The average annual production of air-dry vegetation is about 1300 pounds <br /> per acre. If the condition of the range deteriorates , sleepygrass , ring <br /> J' <br /> muhly, cholla, and tall robbitbrush increase. Range seeding is suitable <br /> if Lhe range is in poor cOnd i t_lon. <br /> if this unit is used for nonirri.gated cropland the gain limitations <br /> are hazard of erosion, -steepness of slope, and insufficient annual <br /> a <br /> precipitation. 1oLa t and oats are the rain crops . because precipitation <br /> is not sufficient for annual cropp,.ng, a cropping S}'SieID t'i.:t InCIUdeS <br /> t <br /> small grain and summer fallow is most suitable. Maintaining crop residue <br /> n c r ... ..r tic nurFn­ du, i ":f rod-ON ,; 1 blowing, znil helps to <br /> :I]c:Nnin Soil i_i i h and urEanic v atter content. Crops respond to nitrogen <br /> and phosphorus fertilizer. Soil blowing can be reduced by planting crops <br /> in alternate strips and at right angles to the prevailing wind. This unit <br /> can produce 18 bushels of wheat in a wheat-fallow cropping system. <br />