Abstract
Information collected on speckled alder during an examination of black spruce and balsam fir reproduction in peatlands of northern Ontario indicates that alder develops rapidly following cutting of the softwood overstorey, but the phase of most rapid height growth is completed within about 10 years when it has attained an average height of five to six feet. Openings of various sizes occur in alder stands. Exclusive of openings, the stands examined varied from 16,000 to 30,000 stems per acre, with the crown closure ranging from 40 to 80 per cent and averaging about 50 per cent.
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