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SUMMARY
In this article results of investigations into the stem volume, bark thickness and stem value of P. pinaster are discussed.
The sample trees were grouped in 5 ft. height classes and in each height class the regression of form factor on DBH was analysed. The adjusted form factors were then used to compile a volume table expressing the relationship between DBH, height and sawtimber volume actually recovered from the stem.
The bark thickness data being analysed statistically indicate a significant effect of aspect, diameter, age and height above ground at the point of measurement.
For each sample tree the volume of the log classes A, B1,…D2 was determined and expressed as a percentage of the total sawtimber volume. The log class volume percentage was plotted over DBH and the regression curves were fitted graphically.
The tree value of each sample tree, based upon current prices of softwood timber delivered at roadside was computed. An equation of multiple regression was used to express the relationship between DBH, height and stem value.