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Patrick J. Conner

(NO 3 ) 2 , H 3 BO 3 , and KNO 3 concentration was evaluated using polynomial regression analysis and models were evaluated by R 2 values. Osmoticum concentration was initially evaluated using a contour plot (Minitab 15; Minitab Inc., State College

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Md J. Meagy, Touria E. Eaton and Allen V. Barker

lettuce. Polynomial regression analysis showed no significant relationship of percent Ca and °Brix. Table 10. Refractometer readings among cultivars with ranking from highest to lowest o Brix. Tipburn. Cultivars differed with expression of tipburn ranging

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David R. Bryla and Robert G. Linderman

significance difference ( lsd 0.05 ) test or Duncan's multiple range test (transformed data). Response to irrigation levels was determined using orthogonal polynomials. Regression analysis was done to determine relationships among plant dry weight, root

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Luiz A. Biasi and Patrick J. Conner

not being evaluated due to missing cells resulting from an unequal number of clusters per shoot tested in different cultivars. The effect of pH, boric acid, calcium nitrate, and sucrose concentration was evaluated using polynomial regression analysis