Effects of site and silviculture on wood density of Douglas fir grown in Canterbury Conservancy.

Authors: J. M. Harris
Publication: New Zealand Journal of Forestry, Volume N.Z.J.For. 1985, Issue N.Z.J.For. 30(1) 1985, pp 121-132, May 1985
Publisher: New Zealand Institute of Forestry

Abstract: Douglas fir has some attraction as a species for afforestation in the Canterbury foothills because of its wind firmness and growth characteristics. Wood density has been examined in a variety of stands from the plains to Arthurs Pass (700 m), and the mean value of 410 kg/m3 basic density for forest-grown trees indicates very satisfactory intrinsic wood properties for this timber. Response to thinning and to growth rate in general, suggests that thinning of Douglas fir in Canterbury can be carried out from age 15 years onward (other factors being equal) without detriment to wood density.