Full text of this article is only available in PDF format.

Paula Jylhä (email), Olli Dahl, Juha Laitila, Kalle Kärhä

The effect of supply system on the wood paying capability of a kraft pulp mill using Scots pine harvested from first thinnings

Jylhä P., Dahl O., Laitila J., Kärhä K. (2010). The effect of supply system on the wood paying capability of a kraft pulp mill using Scots pine harvested from first thinnings. Silva Fennica vol. 44 no. 4 article id 454. https://doi.org/10.14214/sf.454

Abstract

The efficiencies of wood supply systems based on cut-to-length (CTL) harvesting, the harvesting of loose whole trees, and whole-tree bundling were compared using the relative wood paying capabilities (WPC) of a kraft pulp mill as decisive criteria. The WPCs from mill to stump were calculated for three first-thinning stands of Scots pine (Pinus sylvestris L.) with mean breast-height diameter of the removal of 6, 8, and 12 cm. Pulp price had a strong effect on the WPC, and the CTL system resulted in the highest WPC per m3 at stump. The savings in procurement costs and gains in energy generation from additional raw material acquired with the harvesting of loose whole trees did not compensate the losses in pulp production. Considering removal per hectare, loose whole trees gave the highest WPCs at stump in the two stands with the smallest trees and the highest proportion of additional raw material. Decrease in pulp price and increase in energy price improved the competitiveness of the whole-tree systems. In the case of whole-tree bundling, savings in transportation costs did not balance the high cutting and compaction costs, and the bundling system was the least competitive alternative.

Keywords
whole-tree harvesting; cut-to-length harvesting; integrated wood harvesting; residual value; whole-tree bundling

Author Info
  • Jylhä, Finnish Forest Research Institute, Kannus, Finland E-mail paula.jylha@metla.fi (email)
  • Dahl, Aalto University School of Science and Technology, Department of Forest Products Technology, Espoo, Finland E-mail od@nn.fi
  • Laitila, Finnish Forest Research Institute, Joensuu, Finland E-mail jl@nn.fi
  • Kärhä, Metsäteho Oy, Helsinki, Finland E-mail kk@nn.fi

Received 1 March 2010 Accepted 7 October 2010 Published 31 December 2010

Views 2755

Available at https://doi.org/10.14214/sf.454 | Download PDF

Creative Commons License CC BY-SA 4.0

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Laine T., Kärhä K. et al. (2016) A survey of the Finnish mechanized tree-planting.. Silva Fennica vol. 50 no. 2 article id 1323
Jylhä P., Dahl O. et al. (2010) The effect of supply system on the wood paying c.. Silva Fennica vol. 44 no. 4 article id 454
Oikari M., Kärhä K. et al. (2010) Analyzing the views of wood harvesting professio.. Silva Fennica vol. 44 no. 3 article id 144
Kärhä K., Oinas S. (1998) Satisfaction and company loyalty as expressed by.. Silva Fennica vol. 32 no. 1 article id 698
Kärhä K., (2012) Comparison of two stump-lifting heads in final f.. Silva Fennica vol. 46 no. 4 article id 915