Abstract
The quality of Pinus nigra Arn. salzmanni var. pyrenaica round timber was investigated on 120 sample trees from 4 stands with different stocking density in a region of Catalonia /Spain. The age of the sample trees lay between 58 and 68 years. The following morphological tree parameters (hight, crown length and volume, crown projection area) and round timber quality grading criteria (stem volume and taper, spiral grain, crookedness, eccentricity, number and quality of branches, branch diameters and defects) were measured. The results of the crown morphological parameters present significantly higher values in wide spaced stands than in stands with higher stocking density. The round timber quality classification followed the European rule prEN 1927-2 (1995). Significantly more timber volume of the faster grown trees could be classified into quality class B, which allows better utilization as sawn timber. Narrow spaced grown trees showed a higher proportion of pulping wood assortment.
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