Survival of side grafts with scions from pure species <i>Pinus engelmannii</i> Carr. and the <i>P. engelmannii × P. arizonica</i> Engelm. var. <i>arizonica</i> hybrid.

Pearson’s correlation test and stepwise regression to adjust the logit and Weibull models A Pearson’s correlation test indicated that there is highly significant collinearity only between the height of the rootstock and height of the graft, so it was decided to exclude the RH variable in the adjustment of the Logit and Weibull models and include graft height, since the literature on Pinus grafts indicates that this last variable influences survival ( González Jiménez et al., 2017 ).

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