- 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.