Forestry residues can be divided into two categories: 

• (i) Primary forestry residues (PFRs), and
• (ii) Secondary forestry residues. 

PFRs are defined as residues that are left after logging operations (branches, stumps, treetops, bark, sawdust, etc.). In contrast to PFRs, secondary forestry residues are by-products and co-products of industrial wood-processing operations (bark, sawmill slabs, sawdust, wood chips, etc.).

S.K. Karan, L. Hamelin,Towards local bioeconomy: A stepwise framework for high-resolution spatial quantification of forestry residues, Renewable and Sustainable Energy Reviews, Volume 134, 2020, 110350, ISSN 1364-0321, https://doi.org/10.1016/j.rser.2020.110350.

Source category: Scientific & Technical Literature