Šumarski list, Vol. 144 No. 1-2, 2020.
Izvorni znanstveni članak
https://doi.org/10.31298/sl.144.1-2.4
Productivity of a farm tractor with single drum winch during whole-tree timber extraction
Sercan Gulci
orcid.org/0000-0003-3349-517X
; Kahramanmaras Sutcu Imam University, Faculty of Forestry, Turkey
Sažetak
In forested areas with difficult terrain conditions the cost of forest harvesting operations is of great importance. This situation affects the technology standards of tools and equipment used in forestry operations. Especially in developing countries modified farm tractors are widely used as effective tools for transporting timber from stump to landing areas. In this study, productivity of the farm tractor with front-mounted single drum winch designed for multipurpose use in forestry operations was evaluated during whole-tree harvesting operation. The total cost of used system (tractor and winch) is approximately 19580 € (Euro). Time and motion study was implemented by using repetitive time measurement technique during two step timber extraction operation. The effects of main factors such as tree diameter, height, volume, and skidding distance on the total operation time were investigated and then linear regression analysis was performed to develop the mathematical models for whole-tree extraction methods. Time study data resulted that winching trees to the prebunching area was the most time consuming work stage in uphill winching method while skidding trees backward to landing was less time consuming work stage in skidding method. The average productivity of uphill winching and skidding whole-tree was as 12.98 m3/hour and 14.30 m3/hour, respectively. The cost of uphill winching and skidding was 10.77 €/hour and 11.87 €/hour, respectively. It can be concluded that the single-drum hydraulic system, which is mounted on the front of the tractor, can be used as an alternative harvesting equipment especially for uphill winching operations in small scale forestry operations.
Ključne riječi
Mountainous forests; forest harvesting; farm tractor; productivity; whole-tree method; developing countries
Hrčak ID:
234783
URI
Datum izdavanja:
29.2.2020.
Posjeta: 1.608 *