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<br />17 <br /> <br />Net Ben. Per Ac. - The estimated net returns per acres using the <br />indicated cropping pattern and leasing option. Land coot are not <br />included. Benefits/acre were developed for acres served (col.7). <br /> <br />18 <br /> <br />Apple Rate/hr - The application rate for a sideroll system. For <br />a center/pivot system this is the application rate for the ffXi <br />nozzle. The average center pivot application rate will be less <br />than the end nozzle. <br /> <br />Center Pivot Sprinkler Systems <br /> <br />Center pivot sprinkler systems designs were made for most of the fields <br />studied. The same basic procedure was followed as that described for a sidzroll <br />system. <br /> <br />One major difference was that the application rate of the em nozzle was <br />d1ecked against the maximun intake rate for the soil. This usually limited the <br />size of the center pivot sprinkler system. Reduced irrigation labor costs for <br />center pivots will partially offset the higher system cost/acre and was <br />incorporated in the net benefits/acre. Details for each system designed are <br />found in the Table E. <br /> <br /> <br />r- <br /> <br />--- <br /> <br />lYPICAL SIDEROLL IRRIGATION SYSfEll <br /> <br />-12- <br />