Canadian Forest Service Publications
Conifer release experiments in Quebec. 1963. Hatcher, R.J. s.n., S.l. [Report] 63-Q 25. 9 p.
Issued by: Laurentian Forestry Centre
Catalog ID: 15317
Availability: PDF (download)
Varying amounts of hardwood were removed from uneven-aged stands containing red spruce, balsam fir, yellow birch, sugar maple and beech, and the results in the best stands after 20 years showed a spruce-fir production superiority of 6 cords per acre over untreated stands. Recommendations for treating specific stands were not forthcoming but the evidence permits three guide rules to be suggested; 1) for good results, more than 250 spruce-fir stems per acre over 0.6 inch d.b.h. should be present before treatment; 2) removal of hardwoods should begin with the most tolerant species, and 3) hardwoods should be reduced to a volume level equal to or below that of the conifers.