Effect of early release on specific gravity and wood yield of black spruce

Shepard, R.K.; Shottafer, J.E.

Effect of early release on specific gravity and wood yield of black spruce

1990

Shepard, R.K. | Shottafer, J.E.

Ten dominant or codominant trees were sampled from a 29-year-old, released black spruce stand and ten of comparable diameter at breast height (DBH) from a 77-year-old, unthinned stand. A variety of tree characteristics were measured, and specific gravity was determined. The older trees had significantly less taper, shorter crowns, approximately 1.75 times more volume, and 10 percent higher specific gravity (0.435 vs. 0.396). It appears that early release or planting may lead to trees of markedly different characteristics from trees of equivalent DBH but growing in unthinned stands.

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