Abstract
The number of lateral buds on apical shoots of young red oaks, Quercus rubra L., was found to be highly correlated with shoot length. Approximately one-third of these buds subsequently produced branches; the others remained dormant. About 80% of the variation in number of buds and 50% of the variation in number of branches per shoot was accounted for by differences in shoot length. The average number of branches per inch of shoot length was less on longer shoots indicating a reduction in rate of branch formation on fast growing trees. Deliberate injury to terminal portions of a shoot during the dormant season increased the number of branches formed near the residual apex. The branching angle of the first branch formed below the apex of an injured shoot was greater on decapitated shoots than on shoots treated by removing one or more of the buds of the terminal cluster prior to the growing season. The angle of other branches below the apex was not significantly altered by the injurious treatments applied.
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