For each type of restriction (water or light), we compared the various treatment groups.
Chi-squared tests were used to com-pare bud burst distributions as a function of bud location on the stem between groups. For all other variables, groups were compared by one-way analysis of variance (ANOVA), or by non-parametric Kruskal–Wallis tests if the data were not normally distributed or the condition of homoscedasticity was not satis-fied. All statistical analyses were performed with the SAS software(V. 9.2, SAS Institute), using the glm, npar1way and freq proce-dures.