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A Comparison of Flue-Cured Tobacco Varieties Repeated Over Locations and Years with Implications on Optimum Plot Allocation¹

Synopsis: Variety x environment first order interactions were small and nonsignificant for most traits studied. But the interaction of variety x location x year was highly significant although small in relation to the variety component for most of the characters. From a comparison of theoretical variances of treatment means with varying plot allocations, adequate information on the relative performance of tobacco varieties in North Carolina can be estimated from data obtained in 2 years, at each of 5 locations with 3 replications.

² Associate Professor of Field Crops; Assistant Professor of Genetics and Experimental Statistics; and Research Instructor of Field Crops; North Carolina State College, respectively.

Received for publication April 15, 1959.