La pression nominale au sol est un critère important utilisé pour prévoir les effets du poids et de la configuration d’une machine sur les sols forestiers durant les activités de récolte. Le présent rapport traite du concept de pression nominale au sol, de la façon dont il s’applique à différents types de machines ainsi que l’effet des diverses configurations des machines.
Two methods for producing hardwood logs were studied: semi-length to be bucked at the mill yard and clean logs cut at the stump. For a given tree, equal sawable material can be expected from the two The clean log method offers higher pulpwood recovery and does not leave any waste at the stump. The productivity of the clean log harvesting method was lower due to the fact that it was still a relatively new approach.
This report documents the costs and productivities of group-selection harvesting of one-third of a stand in an old-growth cedar–hemlock forest in the interior wet-belt of British Columbia while preserving caribou habitat values. The group-selection harvesting was compared to clearcut and single-tree selection treatments. Harvesting costs were strongly influenced by the merchantability of the harvested stems and the criteria for selecting trees to be harvested. The single-tree selection had the lowest cost because of the selection criteria and merchantability while the group selection had the highest cost. The group selection treatment’s harvesting costs were about 22% greater than for the clearcut treatment.
We surveyed fire behaviour experts and wildlife biologists to rank the importance of four factors that affect the costs and benefits of seven post-harvest debris treatments and to determine the overall costs of each treatment to the forest industry and Alberta’s government. The four factors are fire behaviour potential, wildlife suitability, regeneration capability, and treatment costs.
We tested six plant species or mixes at Vegreville, Alberta to determine their ignition and fire behaviour characteristics and whether they could be used along linear corridors to reduce the fire potential at strategic locations. Nine ignition trials over three years and one grass-fire burning into the test plots were completed to allow ranking of the species based on their characteristics. Three of the species were chosen for additional field studies: white clover, yarrow, and Plateau Rocky Mountain fescue.
This document is in French. Please see the English version.
Ce formulaire PDF accompagne le guide imprimé La gestion des hydrocarbures : guide pratique pour les opérateurs de machinerie forestière. C’est un formulaire qui peut être utilisé en cas de déversement.
FPInnovations studied a series of four partial harvesting trials and one combined partial harvesting–clearcut trial over three years in the Prince George (B.C.) Forest District. The partial harvesting trials harvested pine trees killed by the mountain pine beetle while protecting the non-pine secondary structure. The purpose of protecting the secondary structure is to provide a viable stand that will enhance the mid-term timber supply in 15 to 50 years. This report provides the costs, productivity, and harvesting damage results of the partial harvesting and clearcutting treatments used in the fifth and final trial. The pre-harvest stand was stocked with non-pine trees before harvesting, but was not stocked following the partial harvesting treatment. Slightly more than one-third of the net block area was clearcut for roads, trails, and landings. The trial results suggest up to 23% of the harvested non-pine overstory could potentially have been protected.