Ten-Year Impact of Spruce Budworm on Spruce-Fir Forests of Maine
Date Published: 1992
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- Solomon, Dale S.
US Forest Service - Brann, Thomas B.
University of Maine
Annual measurement from 1975 to 1985 on 278 Maine spruce-fir plots infested by the spruce budworm were analyzed to determine the impact of species composition, growth, and morality. Analysis were done by type, density, host-species composition, diameter, and percent fir or spruce composition classes. Balsam fir accounted for about one-quarter of the initial 1975 basal area per acre in both forest types. Morality of fir was half of this initial basal area by 1985 in mixed wood stands, and three-quarters in softwood stands.
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