Research article Some Preliminary Growth and Yield Data for Thinned Douglas Fir in Kaingaroa Forest, Rotorua Conservancy
Examination of the data from four permanent sample plots in Douglas fir, established and first thinned at ages 21 to 26 years, shows no marked response to thinning and no increase in production in six years. On the other hand, there is an appreciable increase in average tree size and improvement in stand quality. (no keywords)
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