Analysis of a feller-buncher productivity: a case study of whole-tree harvesting from Marmara region, Turkey


  • Neşe Gülci Kahramanmaras Sutcu Imam University
  • Kıvanç Yüksel Kahramanmaras Sutcu Imam University
  • Sercan Gülci Kahramanmaras Sutcu Imam University
  • Hasan Serin Kahramanmaras Sutcu Imam University
  • Ebru Bilici Giresun University
  • Abdullah Emin Akay Bursa Technical University



Clear cutting, mechanized harvesting, quadratic model, statistical analysis


Due to increasing global demands on woody biomass throughout the whole year, private forest industry aims to produce large amount of wood products by the means of mechanized harvesting systems while considering the best productivity options. However, mechanized harvesting can result in additional costs if they are not efficiently planned or effectively implemented in the field. In the present study, productivity of whole-tree harvesting using a feller-buncher was investigated based on time measurements of specified work elements including moving to tree to be cut, cutting the tree, and bunching the tree at the skid trail. The relationships between various factors (tree height, diameter of breast height, and volume) and productivity were examined by statistical analysis. The results indicated that the average productivity of the feller-buncher, which was closely related with tree attribute, was estimated as 74.96 m3/h. To estimating productivity of feller-buncher in harvesting operation, multiple linear and polynomial regression have also performed and discussed after the interpretation of diagnostic plots. It was revealed that polynomial regression increased the success of the model according to the commonly preferred measure indicators. It was also found that there was an adverse correlation and curvilinearity between productivity and the work elements of the feller-buncher.


Abbas D., Handler R., Hartsough B., Dykstra D., Lautala P., Hembroff L., 2014. A survey analysis of forest harvesting and transportation operations in Michigan. Croatian Journal of Forest Engineering 35(2): 179-192.Acar H.H., Ünver S., Özkaya M.S., 2010. Investigation on efficiency of the harvesting machineries at Artvin Regional Directorate of Forestry. Artvin Coruh University, Journal of Forestry Faculty 11(2): 12-19.Acuna M., Sessions J., Zamora R., Boston K., Brown M., Ghaffariyan M. R., 2019. Methods to manage and optimize forest biomass supply chains: A review. Current Forestry Reports, 5(3), 124-141. https://doi. org/10.1007/s40725-019-00093-4Adebayo A.B., Han H.S., Johnson L., 2007. Productivity and cost of cut-to-length and whole-tree harvesting in a mixed-conifer stand. Forest Products Journal 57(6): 59-69.Akay A.E., Özkan D., Bilici E., 2016. Assessing productivity and work safety of a mechanized logging operation. The International Forestry Symposium, 7-11 December, Kastamonu, Turkey.Akay A.E., Sessions J., Serin H., Pak M., Yenilmez N., 2010. Applying optimum bucking method in producing Taurus Fir (Abies cilicica) logs in Mediterranean region of Turkey. Baltic Forestry 16(2): 273-279.Apăfăian A. I., Proto A. R., Borz S. A., 2017. Performance of a mid-sized harvester-forwarder system in integrated harvesting of sawmill, pulpwood and firewood. Annals of Forest Research 60(2): 227-241. https://doi. org/10.15287/afr.2017.909Aruga K., Yamada, T., Yamamoto, T., 2019. Comparative analyses of the cycle time, productivity, and cost between 62-and 107-year-old Japanese cypress clear-cutting operations using a small-scale cable logging system. Small-scale Forestry 18(2): 279-289. https:// E., Abbas D., 2018. Performance analysis of a harvester during timber extraction activities in Bursa, Turkey. European Journal of Forest Engineering 4(1): 7-12. E., Akay A.E., Abbas D., 2018. Assessing the effects of site factors on the productivity of a feller buncher: a time and motion analysis. Journal of Forestry Research 30(4): 1471–1478. 0696-4Câmpu V. R., Ciubotaru A., 2017. Time consumption and productivity in manual tree felling with a chainsaw–a case study of resinous stands from mountainous areas. Silva Fennica 51(2):1657. sf.1657Eker M., Acar H.H., 2006. Operational planning method for timber harvesting. Turkish Journal of Forestry 7(2): 128-140.Enez K., Arıcak B., 2012. Assessment of technical and working conditions of a harvester. Journal of Science and Engineering Special Issue: 108-114.Erdaş O., Acar H.H., Eker M., 2014. Forest transportation technique. Karadeniz Technical University, Trabzon, 504 p.Erler J., Purfürst T., Dög M., 2012. Präzise Forstwirtschaft. Fachinstitut für Waldarbeit e. V. Tharandt, Germany, 92 p.Fernandez-Lacruz R., Edlund M., Bergström D., Lindroos O., 2020. Productivity and profitability of harvesting overgrown roadside verges–a Swedish case study. International Journal of Forest Engineering 32:19-28., 2018. Forest Map of Lapseki Forest Enterprise Chief (FEC). General Directorate of Forestry, Turkey.Ghaffariyan M.R., Acuna M., Kellogg L., 2012. Productivity of roadside processing system in Western Australia. Silva Balcanica 13(1): 49-60.Ghaffariyan M. R., 2021. Review of studies on motor-manual felling productivity in eucalypt stands. Silva Balcanica 22(1): 77-87. silvabalcanica.22.e58750Gülci N., 2014. Researches on precision forestry in forest planning. Dissertation (Doctor of philosophy Thesis), Faculty of Forestry, Kahramanmaras Sutcu Imam University, Kahramanmaraş, 264 p. [Turkish]Gülci N., Yüksel K., Akay A.E., 2017. Productivity assessment of portable hand winch based skidding operation on snow cover. Kastamonu University, Journal of Forestry Faculty 17(1): 124-131.Gülci S., 2020. Productivity of a farm tractor with single drum winch during whole-tree timber extraction. Šumarski list 144(1-2): 35-42. sl.144.1-2.4Heinimann H.R., 2007. Forest operations engineering and management – the ways behind and ahead of a scientific discipline. Croatian Journal of Forest Engineering 28(1): 107-121.Hiesl P., Benjamin J.G., 2013. Applicability of international harvesting equipment productivity studies in Maine, USA: A literature review. Forests 4(4): 898-921. https:// J., Labelle E. R., 2020. Using harvester data from on-board computers: a review of key findings, opportunities and challenges. European Journal of Forest Research 140:1-17. s10342-020-01313-4Long C., Wang J., Mcneel J., Baumgras J., 2002. Production and cost analysis of a feller-buncher in central Appalachian hardwood forest. Council on Forest Engineering Proceedings, 25th Annual Meeting, Forest Engineering Challenges, 16-20 June, Auburn, Alabama.Mușat E. C., Apăfăian A. I., Ignea G., Ciobanu V. D., Iordache E., Derczeni R. A., ... Borz S. A., 2015. Time expenditure in computer aided time studies implemented for highly mechanized forest equipment. Annals of Forest Research 59(1): 129-144. https://doi. org/10.15287/afr.2015.473Öztürk T., 2006. Work phases of wood productivity in Turkey. Journal of the Faculty of Forestry Istanbul University 56(2): 109-122. jffiu.98953Öztürk T., Demir M., 2005. Work performance of MB Trac 900 tractor on mountains terrain in Turkey. American Journal of Applied Sciences 2(1): 363-366. https://doi. org/10.3844/ajassp.2005.363.366R Core Team, 2018. R: A language and environment for statistical computing (R version 3.5.2.), R Foundation for Statistical Computing, Vienna, Austria. http:// [accessed on 28.05.2019].Revelle W.R., 2017. Psych: Procedures for Personality and Psychological Research, version 1.8.12. Northwestern University, Evanston, Illinois, USA.Robinson D., Hayes A., 2018. broom: Convert Statistical Analysis Objects into Tidy Tibbles, version: 0.5.6.Sabo A., Poršinsky T., 2005. Skidding of fir roundwood by Timberjack 240C from selective forests of Gorski Kotar. Croatian Journal of Forest Engineering 26(1): 13-27.Spinelli R., Visser R., Han H.S., 2019. A Decade of Forest Engineering: Achievements and Future Directions. Forests 10(9): 724. R., Magagnotti N., Lombardini C., 2020. Low-investment fully mechanized harvesting of short-rotation poplar (Populus spp.) plantations. Forests, 11(5):502. C., Bailey J., Chung W., 2021. Linking federal forest restoration with wood utilization: modeling biomass prices and analyzing forest restoration costs in the Northern Sierra Nevada. Energies 14(9): 2696. den Boogaart K.G., Tolosana-Delgado R., 2013. Analyzing compositional data with R. Berlin: Springer.Visser R., Spinelli R., 2012. Determining the shape of the productivity function for mechanized felling and felling-processing. Journal of Forest Research 17(5): 397-402. R., Stampfer K., 2003. Tree-length system evaluation of second thinning in a loblolly pine plantation. Southern Journal of Applied Forestry 27(2): 77-82.Wang J., Long C., Mcneel J., 2004. Production and cost analysis of a feller-buncher and grapple skidder in central Appalachian hardwood forests. Forest Products Journal 54(12): 159-167.Wickham H., 2016. ggplot2: Elegant Graphics for Data Analysis. New York (NY): Springer.Zecic Z., Krpan A.P., Vukusic S., 2006. Productivity of C Holder 870 F tractor with double drum winch Igland 4002 in thinning beech stands. Croatian Journal of Forest Engineering 27(1): 49-57.Timbal J., Aussenac G., 1996. An overview of ecological and silviculture of indigenous oaks in France. Ann. Sci. For., 53: 649-661.Weaver G., Spiecker H., 1993. Silviculture of high-quality oaks: questions and future research needs. Ann. Sci. For., 50(6): 531-534






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