o:7192 ORIJENTACIONI NORMATIVI VREMENA SEČE, PRIVLAČENJA I IZVOZA DRVNE MASE PROREDNIH SEČA APPROXIMATE TIME NORMATIVES FOR FELLING, SKIDDING AND REMOVAL OF THINING MATERIAL sr Felling and pruning of pine trees in Managemenet unit »Crvena Gora« was made by four workers. The first operation was done with motorsaw and the second one with axe of shortened handle. The lanes were 5 m. wide, about 20 m distant from each other, vertical to main haulage mad. Skidding of felt and pruned trees was done with two horses, while the removal from lanes was done with two-horse cart. Leading was done by two coachmen, who have gathered the roundwood. A total of 197 trees was felt, the mean diameter of felt trees being 8 cm. (mean volume per tree Vt = 0,028 m3). The following results were obtained: - felling: 6,38 m3/day, resp. 223 trees/day - skidding: 11,59 m3/day, resp. 300 trees/day - loading: 73,66 m3/day - removal: mean volume of the load 0,85 m9 or 22 trees by a mean speed of the cart of 63,19 m/ min. Also investigation of a mechanized bark-peeler VK-10 was made, which was moved by IMT-533 tractor. For 400 min. of the work, the mean effect was 41,47 m3/day. It was found that by the use of this bark-peeler the wastewood together with bark ammounted to 1,19 m9, whnat makes 32,6% of the total wood volume with bark. 2025-03-06T08:52:40.064Z 44 yes 46 Bogdan Vulović application/pdf 2880309 https://unilib.phaidrabg.rs/o:7192 no yes 1 70 92000001 1981 71A07 Zbornik radova Instituta za šumarstvo 16-17 79 86 Institut za šumarstvo 1981