DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 7-8/2003 str. 16 <-- 16 --> PDF |
A. Sabo: OŠTEČIVANJE STABALA PRI PRIVLAČENJU DRVA ZGLOBNIM TRAKTOROM ... Šumarski list br. 7-8, CXXV11 (2003), 335-346 B. The most frequent type of damage in both stands was the peeled bark (97 % in A and 94 % in B). The highest number of damages was caused by load - 97 % (A) and 92 % (B). In view of the economic importance, selected and useful trees were mostly damaged in timber skidding. Hard and very hard condition of damaged trees was found in 95 % (A) and 94 % (B). The average distance of the damaged tree from the strip road was 7 m at the site A and 6.2 m at the site B. The average slope of the damaged tree micro-terrain was 10.6% (A) and 7.9% (B). At the site A, seedling and young growth were mostly damaged up to the height of 1.3 m and at the site B above the height of 3.0 m. By a series of indicators of stand damages it has been confirmed that stand and terrain conditions are the crucial damaging factors, provided that other conditions are equal - technology and methods, means of work and operators. Thus the need has been confirmed again for developing the stand working classification aimed at modeling the standardized dynamic weights and measures for evaluating the quality of the work performed in forests. Without such solutions it will be impossible to up-grade (or even to introduce) the evaluation system for establishing the complex efficiency of wood production and other working (production) processes in forestry. Key words: timber skidding, stand damaging, damage, economic importance, tree damage. 346 |