This study quantifies the economic impact of growth distortion on immature Douglas-fir timber values. The research investigates lumber yields from a sawmill recovery study to determine variations in tree values caused by prevalent growth distortion in specific stands on Vancouver Island. After initial sampling, 42 trees were selected based on size, branching, and sinuosity, then felled and processed into lumber. The analysis focused on lumber grade and volume yields to calculate tree values and examined the effect of branching and sinuosity indices on these values, also investigating potential increases in drying defects.

This technical report details a specific study on timber valuation within the forestry sector. The methodology employed, including sawmill recovery analysis and statistical testing, suggests a focus on empirical data and quantitative assessment. The findings are likely of interest to foresters, timber valuers, and researchers concerned with the economic implications of tree growth characteristics.