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<br /> <br />ro <br />CD <br />o <br />-.J <br /> <br />"ater based upon the e~Clnomics of preva'ilin~ c'mdili,ons. The <br /> <br />requIred mineral qllality le",'ls are maintained I,n boiler an~ <br /> <br />cooling sv~tems by periodically addinr, 'an amount of re1aUw'I:' <br /> <br />good 'Juali ty "ater (makellp "ater), and, discha r'J~ing from the <br /> <br />system an equal voJume of the poorer quality "ater (1) I m.d 9wn \ . <br /> <br />c. The allernativM avaUnble to irripaUon water IIqers are <br /> <br />inflnenced by the availability of addtUonal "ater. '['he pri- <br /> <br />m,,,t'Y means of cOl"bating detri",ental salinIty ar~ to s..itch to <br /> <br />more saIl tolerant varieties of present crops, Sl.itch to snb- <br /> <br />stitllt.. crops les~ affe~ted by ~aH.nity, or ,to a1)ply more <br /> <br />irrigation water to keep the ex~ess salls movi,ng O\lt of the <br /> <br />root zone. <br /> <br />(1) If the irril7,ator does nothing, he IliI I suffer economic <br /> <br />loss from decreased crop yields. <br /> <br />(2) If additional water is avanable, root zone salinity <br /> <br />'may be reduced by increasing leachin!) "ater applicaUonA. <br /> <br />The irri~ator would in~ur i.ncreased costs for purchA~(, of <br /> <br />water, for additional labor for water application, and for <br /> <br />increased application of fertilizer to replace the fertil- <br />, , <br /> <br />izer leached Ollt. <br /> <br />(3) If no additional water, iR availahle. the irri"ator <br /> <br />can increase the leaching of salts from the soil by <br /> <br />8 <br />