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<br />0012G3 <br /> <br />7 <br /> <br />Because only limited areas in Oregon nave salinity problems, <br />runoff water can be used and reused at lower elevations as tne <br />runoff is collected. This is particularly important for many of <br />the narrow valleys which are irrigated from natural flow. The <br />excsss water supplied to these farms is not lost but is quiCkly <br />returned to the streams and picked up by tn. next farmer down <br />the line. <br />Most of the irrigation projects in Oregon deliv.r water from <br />storage reservoirs rather than from streamflow and for this <br />reason are limited to a maximum amount of water which can be <br />diverted and delivered. This has encouraged improvement of dis- <br />tribution systems as well as farm systems. <br />Nearly 100 percent of the desert lands which have recently <br />bean developed, have been put under sprinkler system. peCause <br />they apply the water more efficiently. In western Oregon because <br />or land leveling problems, water supply and the availability of <br />experienced surfeee irrigators, about 95 percent of the land <br />under irrigation is sprinkler irrigated. There has bean allo a <br />continuing increase in the number of acres being sprinkler irri- <br />gated on established irrigation projects. This trend has taken <br />place particularly on crops which require frequent ligbt irriga- <br />tions because water can be applied more efficiently through the <br />sprinkler system. <br />On lands where soil is deeper and bstter adapted to surface <br />irrigation, well-designed lurrace systems sre used. In tbe state <br />as a wbole, 80 percent of tbe land irrigated is surface irrigated. <br />The Cooperative Extension Service and various processing and <br />utility companies have for a number of yaars conducted programs <br />