The subject of the study was determining the level of workload connected with timber harvesting in selective early and late pine stand thinning. During the operations a manual-machine technology within short wood system was used. Tree cutting and felling were carried out by a sawman with a few years’ experience. Debarking and cross-cutting were performed by NIAB 5-15 and HYPRO 450 processors, equipped with cable winches controlled by an operator by means of a radio and used in the first stage of skidding. Energy expenditure was specified based on lung ventilation. Measurements were carried out by MWE-1 expenditure-measuring device of Polish production. The average energy expenditure during sawman’s work with the use of the processor technology was ca. 26.2 kJ/min, while the average operator’s energy expenditure during work was 13.8 kJ/min. Energy cost analysis of performed works point out to a relatively small processor operator’s load, as well as considerable decrease of the load in case of a sawman cooperating with the processor. However, due to the existence of some single operations requiring a substantial physical engagement, work in these two positions can be qualified as hard.
|MLA||Leszczyński, Krzysztof, et al. "Level of workload in timber harvesting of thinned pine stands with the use of processors aggregated with farm tractors." Nauka Przyr. Technol. 6.3 (2012): #50.|
|APA||Krzysztof Leszczyński, Arkadiusz Stańczykiewicz, Janusz M. Sowa (2012). Level of workload in timber harvesting of thinned pine stands with the use of processors aggregated with farm tractors. Nauka Przyr. Technol. 6 (3), #50|
|ISO 690||LESZCZYńSKI, Krzysztof, STAńCZYKIEWICZ, Arkadiusz, SOWA, Janusz M.. Level of workload in timber harvesting of thinned pine stands with the use of processors aggregated with farm tractors. Nauka Przyr. Technol., 2012, 6.3: #50.|
Katedra Użytkowania Lasu i Drewna
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
al. 29 Listopada 46