%0 Research note
%T Energy wood and pulpwood harvesting from young stands using a prototype whole-tree bundler
%A Jylhä, Paula
%A Laitila, Juha
%D 2007
%J Silva Fennica
%V 41
%N 4
%R doi:10.14214/sf.470
%U https://silvafennica.fi/article/470
%X The productivity of cutting and bundling whole trees using the first  prototype of a bundle-harvester comprised of a harwarder as the base  machine, an accumulating felling head, and a compacting device was  studied in three young stands in order to facilitate the further  development of the concept. In addition, the removal and its composition  were studied as a means of laying the foundations for developing  methods for work rating and measurement on delivery. Bundling enables  in-depth integration of pulpwood and energy wood procurement. Both  energy wood (crown biomass) and pulpwood can be incorporated into the  same bundles, and the subsequent separation of these fractions takes  place at the debarking phase at the pulpmill. Bundle-harvesting  productivities were relatively low (2.8–3.7 m<sup>3</sup>/E<sub>0</sub>-h)  when compared to current harvesting technology. Improving working  techniques, machine structure, and components showed great potential for  increasing the efficiency of the concept. The bundles were  dimensionally uniform. Their solid volume varied between 0.350 m<sup>3</sup> and 0.513 m<sup>3</sup>,  depending on the bundle assortment and stand properties. Integrating  energy wood harvesting with pulpwood harvesting increased removal even  by 59 per cent.