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<br />"." <br />': ,1 <br />1,;., <br />"..> <br />---) <br /> <br />flows will have to be calculated for each field and accurate <br /> <br />,~\ furrow water measurements will have to be made to obtain <br /> <br />uniform water application. <br /> <br />On the Allmaras farm we installed a level ditch system <br /> <br />with timed gates but it wasn't until last summer that we began <br /> <br />to really use the system effectively. The Soil Conservation <br /> <br />Service gave us the optimum furrow flow of six gallons per <br /> <br />minute. The sets had sixty furrows each so the inflow flumes <br /> <br /> <br />were set to measure-360 GPM. Each furrow outlet was then adjusted <br />'. <br /> <br />for 6 GPM and the optimum irrigation time was set for 18 hours. <br /> <br />The most important part of the whole project has been that final <br /> <br />measuring of the system, It is possible to install the best <br /> <br />pOl3sible irrigation system and still have poor water <br /> <br />management. Therefore, the success of the whole on-farm <br /> <br />project is contingent upon the degree of cooperation between <br /> <br />the farmer and the Soil Conservation Service. <br /> <br />Notes on Drip Irrigation <br /> <br />I have been requested by Mr. Robins of the World Bank to <br /> <br />write some observations concerning experiences with drip <br /> <br />irrigation in this area. A list of the observations are as <br /> <br />follows: <br /> <br />1. 70% of the water now being used on orchards can be <br />saved. <br /> <br />2. The tendency for an operation to want some schedule <br />on watering other than daily is very strong. Often <br />a delivery system does not support daily watering. <br /> <br />3. The quality of water delivered from the Colorado River <br />necessitates a larger amount of filtration and several <br />hours settling time; this tends to make the drip <br />system very expensive. A better system for this area <br /> <br />-3- <br />