| УДК |
Аннотация: The experiment has shown significant effects of depth to water table on jack pine height growth, and therefore supports the interpretation of site index variations of jack pine. The experiment has served to explain the effect of depth to water table gradients on forest distributiion, as black spruce died on the upper slope of the sandy soil, and jack pine survived. Thus it seems certain that the absence of black spruce on dry sites in southeastern Manitoba is due to its inability to form deep root systems on nutritionally poor soils.
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