Abstract
To study the effects of selection cutting and to determine the optimal residual basal area after such cuttings, an experimental area was established in Sainte-Véronique (Quebec) in 1983. Five-year results indicate that the gross rate of growth increases when residual basal area decreases. The best net annual basal area growth lies between 0.40 and 0.43 m2/ha in selection plots; this is almost twice the growth of control plots. Sugar maple regeneration is excellent no matter the residual basal area. Selection cuttings also resulted in a good yellow birch regeneration, and survival is better, after 5 years, in high residual basal area plots. Yellow birch regeneration is almost absent in control plots. When all factors (growth in basal area, regeneration, and tree injuries) are considered, block 2, with a residual basal area of 19.3 m2/ha, gives the best results after 5 years.
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