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<br /> <br />irrigation delivery systems. Plant vigor and crop yields <br />would be greatly reduced if irrigation was not maintained. <br />3. Other Crops: Field nl appears to have recently supported <br />an irrigated corn crop, as evident by the crop residue. <br />The soil in this field is mapped as Nub (Nunn clay loam, <br />1 to 3 percent slopes), with an irrigated capability unit <br />Its-1, making it the best soil producing crops on the Dowe <br />Flats property. <br />D. Rangeland Ecosystems <br />The rangeland was evaluated on the bases of individual range- <br />land ecosystems. Range ecosystems (range sites) are the basic <br />components of rangeland inventories. They are ecological sub- <br />divisions into which rangeland is divided for study, evalu- <br />ation, and management. <br />Each ecosystem, as identified on the property, was evaluated <br />and compared to its ecological climax potential (S.C.S. method). <br />Therefore, condition classifications were derived from the <br />following S.C.S. guidelines: <br />% of present plant community <br />• Range Condition that is climax for the ecosystem <br />Excellent 76 - 100 <br />Good 51 - 75 <br />fair 26 - 50 <br />Poor 0 - 25 <br />Range sites (see specific descriptions in the index) identified <br />on the property included shallow foothills, sandy foothills, <br />loamy foothills, cobbly foothills, clayey foothills, clayey <br />plains and wet meadow. <br />The condition of the above range sites ranged from poor to <br />fair. Dominant species of the potential range sites were sig- <br />nificantly surpressed, plant vigor was poor, residues are lack- <br />ing, potential species of the plant communities are not repro- <br />ducing, and past erosion is evident. The majority of the range <br />land ecotypes are in a downward trend and probably will continue <br />to deteriorate if proper grazing management is not addressed. <br />r <br />- 6 - <br />