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Effects of Thinning, Patch Clearcutting, Site Preparation, and Planting on Development of Yellow Birch in Quebec

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This is a report of a 1964 thinning and patch clearcutting to increase the proportion of yellow birch in a sugar maple-yellow birch stand in the Dudswell Forest. In 1984, 20 years after treatment, improved quality, health, and growth of thinned stands were observed. Dieback or partial mortality of the crown varied between 0 and 10% in thinned plots and between 25 and 50% in unthinned plots. Despite this dieback in unthinned plots, net growth between 1979 and 1984 was 6 m³/ha. The abundant natural regeneration was growing well, especially in the openings created by clearcutting. Soil scarification, with or without yellow birch artificial seeding, stimulated yellow birch establishment, but the effect did not persist and had disappeared by 1969 or within 5 years. Planting yellow birch increased the number of dominant yellow birch saplings in 1969 and in 1974 or for 10 years. In 1979, when the first release cutting was carried out in the patches clearcut 15 years before, yellow birch dominated in 4% of the subplots; this increased to 18% after the release cutting. From 1979 to 1984, released yellow birch saplings doubled in diameter and were of better quality than the unreleased ones. North. J. Appl. For. 5:248-251, December 1988.
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Document Type: Journal Article

Affiliations: Laurentian Forestry Centre, Canadian Forestry Service, 1055, du P.E.P.S., Sainte-Foy, Quebec Canada G1V 4C7

Publication date: 1988-12-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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