%0 Research article
%T The effect of supply system on the wood paying capability of a kraft pulp mill using Scots pine harvested from first thinnings
%A Jylhä, Paula
%A Dahl, Olli
%A Laitila, Juha
%A Kärhä, Kalle
%D 2010
%J Silva Fennica
%V 44
%N 4
%R doi:10.14214/sf.454
%U https://silvafennica.fi/article/454
%X 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 m<sup>3</sup> 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.