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Original scientific paper

Productivity and Time Consumption of Timber Extraction with a Grapple Skidder in Selected Pine Stands

Dariusz Kulak ; University of Agriculture in Krakow Faculty of Forestry Institute of Forest Utilization and Forest Technology Department of Forest and Wood Utilization Al. 29 Listopada 46 31–425 Krakow POLAND
Arkadiusz Stańczykiewicz ; University of Agriculture in Krakow Faculty of Forestry Institute of Forest Utilization and Forest Technology Department of Forest and Wood Utilization Al. 29 Listopada 46 31–425 Krakow POLAND
Grzegorz Szewczyk ; University of Agriculture in Krakow Faculty of Forestry Institute of Forest Utilization and Forest Technology Department of Forest and Wood Utilization Al. 29 Listopada 46 31–425 Krakow POLAND

Fulltext: english, pdf (640 KB) pages 55-63 downloads: 353* cite
APA 6th Edition
Kulak, D., Stańczykiewicz, A. & Szewczyk, G. (2017). Productivity and Time Consumption of Timber Extraction with a Grapple Skidder in Selected Pine Stands. Croatian Journal of Forest Engineering, 38 (1), 55-63. Retrieved from https://hrcak.srce.hr/174450
MLA 8th Edition
Kulak, Dariusz, et al. "Productivity and Time Consumption of Timber Extraction with a Grapple Skidder in Selected Pine Stands." Croatian Journal of Forest Engineering, vol. 38, no. 1, 2017, pp. 55-63. https://hrcak.srce.hr/174450. Accessed 20 Oct. 2019.
Chicago 17th Edition
Kulak, Dariusz, Arkadiusz Stańczykiewicz and Grzegorz Szewczyk. "Productivity and Time Consumption of Timber Extraction with a Grapple Skidder in Selected Pine Stands." Croatian Journal of Forest Engineering 38, no. 1 (2017): 55-63. https://hrcak.srce.hr/174450
Harvard
Kulak, D., Stańczykiewicz, A., and Szewczyk, G. (2017). 'Productivity and Time Consumption of Timber Extraction with a Grapple Skidder in Selected Pine Stands', Croatian Journal of Forest Engineering, 38(1), pp. 55-63. Available at: https://hrcak.srce.hr/174450 (Accessed 20 October 2019)
Vancouver
Kulak D, Stańczykiewicz A, Szewczyk G. Productivity and Time Consumption of Timber Extraction with a Grapple Skidder in Selected Pine Stands. Croatian Journal of Forest Engineering [Internet]. 2017 [cited 2019 October 20];38(1):55-63. Available from: https://hrcak.srce.hr/174450
IEEE
D. Kulak, A. Stańczykiewicz and G. Szewczyk, "Productivity and Time Consumption of Timber Extraction with a Grapple Skidder in Selected Pine Stands", Croatian Journal of Forest Engineering, vol.38, no. 1, pp. 55-63, 2017. [Online]. Available: https://hrcak.srce.hr/174450. [Accessed: 20 October 2019]

Abstracts
This paper presents the results of the study on work time and productivity of the John Deere 548G-III grapple skidder operating in pine stands on flat terrain. The research covered three types of treatment: late thinning, removal cutting in openings and clear cutting in openings. The average skidding distance was between 120 and 250 m. In the clear-cut stands, a mean duration of a skidding cycle accounted for 12 minutes, while in the thinned ones it was longer, lasting ca. 16 minutes. The investigators performed an estimate of parameters of multiple regression models, which revealed dependences between:
Þ duration of skidding cycles and stand conditions, number of logs per load and skidding distance, and
Þ productivity achieved in specific skidding cycles and the above-mentioned variables, as well as wood volume per load.
The highest productivity within the productive work time of a skidder was recorded in the stand where removal cutting in openings was performed; it exceeded 14 m3×h-1. In other stands, the efficiency was lower, not greater than 9 m3×h-1. However, differences between the productivity achieved within the productive work time and that recorded for the work place time did not exceed 20%, which indicated that skidding operations in the stands under scrutiny were organised properly.

Keywords
timber skidding; work efficiency; modelling of work time; productivity

Hrčak ID: 174450

URI
https://hrcak.srce.hr/174450

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