Early Response of Balsam Fir to Spacing in Northwestern New Brunswick (1981)
Problem Addressed: Balsam fir development
Goal(s)/Objective(s): Describes the early development of young balsam fir/white spruce stands in northwestern New Brunswick which were spaced to several different levels of spacing, about 02 years ago.
Key Findings: Evaluation of "optimal" spacing levels will involve an economic analysis of such factors as cost of spacing, the relationship between merchantable yield and initial spacing, the influence of average tree size on logging costs, and relative costs and benefits of alternative silvicultural treatments such as fertilization.
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- Ker, M. F.
Canadian Forestry Service
Young fir-spruce stands in northwestern New Brunswick, spaced 20 years ago, show greatest yield of merchantable fibre at initial spacings of 1.7 x 1.7m. Maximum mean merchantable volume was 158.3 m3/ha, 15% above mean unthinned volume, 20 years after spacing. Average tree diameter increased steadily with increasing spacing. Quadratic mean diameter was up to 14% greater in spaced stands than in unspaced stands, 20 years after spacing. Conclusions are based on data from 64, one-fifth acre permanent sample plots established between 1959 and 1967 and remeasured at 5-year intervals.
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