Nauka Przyroda Technologie

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Krzysztof Leszczyński, Arkadiusz Stańczykiewicz, Janusz M. Sowa
Level of workload in timber harvesting of thinned pine stands with the use of processors aggregated with farm tractors
Summary.

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.

 

Key words: expenditure of energy, sawman, processor operator, early and late thinning, cut-to- -length system
PDFFull text available in Polish in Adobe Acrobat format:
http://www.npt.up-poznan.net/tom6/zeszyt3/art_50.pdf

For citation:

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.
Corresponding address:
Krzysztof Leszczyński
Katedra Użytkowania Lasu i Drewna
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
al. 29 Listopada 46
31-425 Kraków
Poland
e-mail: rlleszcz@cyf-kr.edu.pl
Accepted for print: 23.02.2012