Dan Glöde, Ulf Sikström. (2001). Two felling methods in final cutting of shelterwood, single-grip harvester productivity and damage to the regeneration. Silva Fennica vol. 35 no. 1 article id 604. https://doi.org/10.14214/sf.604

Keywords: silviculture; time study; cost; forest operations; felling technique; logging-damage

Abstract | View details | Full text in PDF | Author Info

In order to find an efficient and careful way of final-cutting shelterwoods, two felling methods, in a single-grip harvester system, were compared with respect to productivity and damage caused to the regeneration. The shelterwood (140–165 m3/ha) consisted of Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris L.) and the natural regeneration (9530–11 780 seedlings/ha) mostly of Norway spruce. Treatments were: (i) conventional felling on both sides of the harvester striproad, preferably in blanks of the regeneration; (ii) felling of the trees top-end first into the striproad using a method named “tossing the caber”. Both treatments included forwarding after felling. Conventional felling had a non-significantly higher productivity (27.4 m3/E15–h) and lower cost (25.9 SEK/m3) than tossing the caber (26.1 m3/E15–h and 27.2 SEK/m3). However, tossing the caber was significantly more efficient in the felling and processing of pine trees compared with conventional felling. The mean proportions of the disappeared and damaged seedlings were approximately 40% after both treatments. The logging-related damage to the regeneration decreased with increased distance to the striproad in the tossing the caber treatment but not in conventional felling. The conclusions were that there were no differences between the treatments regarding productivity, cost and total damage to the regeneration in mixed conifer shelterwoods but that tossing the caber could be a more productive method than conventional felling in pine dominated stands. Tossing the caber could also be beneficial at a regeneration height of 2–3 m since at this height the damage to the regeneration seems less than at conventional felling.

Glöde, SkogForsk, Uppsala Science Park, S-751 83 Uppsala, Sweden E-mail: dan.glode@skogforsk.se
Sikström, SkogForsk, Uppsala Science Park, S-751 83 Uppsala, Sweden E-mail: us@nn.se

Click this link to register to Silva Fennica.

If you are a registered user, log in to save your selected articles for later access.

Contents alert

Your selected articles
Send to email

Korhonen L., Korhonen K. T. et al. (2006) Estimation of forest canopy cover: a comparison .. Silva Fennica vol. 40 no. 4 article id 315 (remove) | Edit comment

Silvola J., Välijoki J. et al. (1985) Effect of draining and fertilization on soil res.. Acta Forestalia Fennica vol. 0 no. 191 article id 7637 (remove) | Edit comment

Vartiamäki H., Hantula J. et al. (2009) Susceptibility of silver birch pruning wounds to.. Silva Fennica vol. 43 no. 4 article id 179 (remove) | Edit comment

Renvall A., (1923) The degree of radial shrinkage of pine stem wood.. Acta Forestalia Fennica vol. 26 no. 3 article id 7091 (remove) | Edit comment

Renvall A., (1923) Observations on the eccentricity of pine trunks .. Acta Forestalia Fennica vol. 26 no. 4 article id 7092 (remove) | Edit comment

Kärkkäinen M., (1969) The amount of injuries caused by timber transpor.. Acta Forestalia Fennica vol. 0 no. 100 article id 7609 (remove) | Edit comment

Keltikangas M., (1971) Effects of drain spacing on the economic results.. Acta Forestalia Fennica vol. 0 no. 123 article id 7557 (remove) | Edit comment

Malinen J., Haring M. et al. (2015) Comparison of alternative roundwood pricing syst.. Silva Fennica vol. 49 no. 3 article id 1293 (remove) | Edit comment

Lakari O. J., (1919) Proposal to prepare growth and yield tables for .. Acta Forestalia Fennica vol. 12 no. 4 article id 7031 (remove) | Edit comment

Fernandez M. M., Bezos D. et al. (2018) Fungi associated with necrotic galls of Dryoc.. Silva Fennica vol. 52 no. 3 article id 9905 (remove) | Edit comment

Bhat K. M., Kärkkäinen M. (1981) Variation in structure and selected properties o.. Silva Fennica vol. 15 no. 1 article id 5095 (remove) | Edit comment

Follow @SilvaFennica