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<br /> <br />r..:> <br />en <br />... <br />w <br /> <br />" <br />'... <br /> <br />" <br /> <br />its importsnce ss sn advance in the conceptualization of the <br /> <br />problem of measuring d...ges due to salinity, it also consti- <br /> <br />, <br />tutes the only analysis comparable in scope to the EPA's esti- <br /> <br />mates of agriculture damages in the Lower Colorado River Ba.in. <br /> <br />The Sun approach to pre~icting cro~ re.pon.e to aoi1 salinity <br /> <br /> <br />aftd 1n~.tton .cb.d1l11n. 1"".1..4 a ,....r..a. ....1 incor- <br /> <br />poratinl 1,944 proc...... The ,roc..... r.flect.d eacb of <br />nine crap. On ..ch of three .oil type. in e.cb of .ix .ubregions <br />of the IlIIpsr1al V.U." fOlf ~h of thr.. f,.ra .b...Por each <br />of these in turn, sproce.. was developed for three irrigation <br />sch.duling rule. and four l.vel. of int.ke water quality (mg/1 . <br />480, 960, 1,280, and 1,920). The ..d.l w.. .01v.d to derive <br /> <br />net regional income for the four level. of water quality. <br /> <br />Setting the n~t returns witb'mg/1 at 960 .qual to 100 percent <br />(which Sun defined a. curr.nt 1970 ..linity level), expected <br />n.t r.turn. d.cr.... 12-15 p.,cent vben themg/1 is 1,280. <br />Ch.ng.. in n.t '...t~..., b...,lained by the chan8es in total <br />crap .cre.ge,productiOn of hi.h valued craps, adoption of <br />1e.ching fr.ctiOn and ..i.tura d.pletion percentage. <br /> <br />The 'change of optimum 'crop production from mg/1 of '960 to 1,280 <br />re.ult.d in a reduction of net annual farm income of $7,594,427. <br /> <br />, 't_ <br /> <br />14 <br />