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<br />peri,od dur.:Ln,g which cloud .seedi.ng ,oper.ationswer,enot :condu.et,e,d.
<br />The latter yearsar,e the yearsduri:ng which th:eNorth .D.ak.ota ,Cloud
<br />Modificationproqram (N'DCMiP' has been ,eonduot,ed.The intervening
<br />y.ears were not included in elther s,etbecause i.seelin.q w,as
<br />intermittent, at different locations" andmet.hodoloqi,eswerie ,quite
<br />varied.
<br />Prelim.inary results., after alll. lrriq,ate.d ,a,cr,ea'gewas
<br />ex,cludecl" s'ulJgest ;an increas,e .in wileat. yi,e,lLd.s ,on.t.he ,order iof st
<br />in the ta.rg:eted io,ountl,es,when e.ompare,d t,o .ad.ja.centan,d .downwina
<br />non -,partl,elpating(,oont.rol) countia:s.. 'Thes.er,esul tsdonot $11q-
<br />ge,std.ecrea'sed yteld'S in theeentrol ,counttes "rath,er ti'leprociuc-
<br />tien in,cr:eases have av,eraqed that maeh hiqher in the t,ar,get.. The
<br />analyslsi.'s not yetoom,pl1ete however, a's the Ji.ntervenlnqy.ea:rs
<br />(1'952 -.'1972 ) are now being c,arefu,lly re-examined 1n ,anattel\\pt:to
<br />determlne whether ,or not ttleobaerwed ir.torea,s,e" :sos'tro.ngly
<br />corr,elat.ed,wlth tae tarqiet eountie,s"coulod havieX\esul,t.:ed :trom
<br />another f'a'ctor be:sl,des .cJloud,seedinq. A more ,det:all.led rep.ort ;wll1
<br />be ocmpl,eteddurlngt.het\ollowin,q;b,tenn1'1lIn..
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