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<br />, . <br /> <br />. Effect of Limited Irrigation <br />on Yield of Sugar Beets <br />Pa ge 5 <br /> <br />. <br /> <br />In the moderate stress section, there was a decl ine in both beet and sugar <br />yield from the unthinned treatments to the 100-110 thinning. The yield <br />increased with the high 67-75 thinning rate, with the highest tonnage <br />produced at the 67-75 beets per row stand. <br /> <br />Yields in the heavy stress area ranged from 21.3% to 26.3% less than <br />the full irrigated sections. Sugar per acre yields followed the same <br />pattern. Within the heavy stress .treatment, yields tended to increase with <br />the increase in thinning rate. <br /> <br />In the dryland section, the beets thinned to the 67-75 beets per row rate <br />exhibited. the best yield. The yield of beets with a 100-110 stand was only <br />31.4% of its full irrigated counterpart. When thinned to the 67-75 stand, <br />the yield increased to 36.3% of the fully irrigated counterpart. As would <br />be expected, statistical eval uation confirmed the effect of water on gross <br />yield of beets and net yield of sugar. An F value of 31.879 with a significance <br />of .001 was witnessed for gross yield of beets and 34.611 at the .001 level <br />for sugar. <br /> <br />fiGURE] <br /> <br />[fFECT or STANO <br />ON flfLOOF BEETS <br /> <br /> <br />FIGURE 4 <br /> <br />EFFECT OF 5TAIC) ON <br />Y!ELDor SUGAA <br /> <br />40,000 <br /> ".~ 7,000 <br /> FULl. IRRIGATION 6,633 <br /> 3. ,S6 ~" <br /> FULL IARH1ATION <br /> 33,561 <br /> J2,~ Jo(IOERAUSTRESS 6,000 <br /> 5,668 <br /> 31,167 ~31 MOO[RATESTRESS <br />jU,UU(J <br /> . HEAVY STRESS ~ 5,000 5,344 <br /> 28,212 28.306 28,920 <br /> ...., . HEAVY STRESS <br /> ~ "4,81S 4.869 <br />~ 0 <br /> 0 <br /> ~ <br /> > <br /> 4,000 <br />20,000 <br /> 3,000 <br /> ~485 OR' <br /> '.000 2.207 <br /> ~.364 OR' <br /> H.sf' lklthinned 100-110 67.75 <br />10,000 STANO <br /> Unttdnned 10;'.110 67-75 <br /> STklD <br /> , <br /> <br />