The Mountain Alternative Silvicultural Systems (MASS) study is a multi-disciplinary, multi-agency project initiated both for silvicultural and social reasons. MacMillan Bloedel Limited, the Canadian Forest Service, and FERIC cooperated in the study, with participation by the University of Victoria and the University of British Columbia. Three alternative treatments representing a range of canopy removal levels - uniform shelterwood, green tree retention, and patch cutting - were implemented in the research area, located on the east coast of Vancouver Island. FERIC monitored the productivity and cost of the falling and forwarding operations, and measured site disturbance and coarse woody debris for each harvesting treatment. The results of FERIC's study are presented.
The 1-2-3 shelterwood cut system developed by FPInnovations–Feric Division is increasingly being used as part of new ecosystem management approaches in eastern Canada. Feric evaluated the direct harvesting costs for the first entry phase in a shelterwood system implemented using the 1-2-3 method, which is also called shelterwood cutting with close selection. We compared the results of the partial cutting operation with those of harvesting with the protection of regeneration and soils (HPRS). The harvesting costs in the shelterwood approach can be up to $1.87/m³ more than in the HPRS treatment. However, the increased mean stem volume that is harvested as a result of the stem selection guidelines can mitigate this adverse impact in stands with large trees.
The Date Creek Silvicultural Systems Study compared clearcut, heavy removal, and light removal silvicultural systems in 135-year-old hemlock/cedar stands in northwestern British Columbia. FERIC monitored productivities and costs of mechanized, conventional, and horse skidding harvesting systems on six study blocks (two clearcuts, three heavy removals, and one light removal). FERIC's objectives were to assess planning and harvesting productivities and costs: assess soil disturbance levels; and identify ways to improve operational planning and implementation of partial cutting silvicultural systems in Interior Cedar-Hemlock ecosystems.
The Forest Engineering Research Institute of Canada (FERIC) performed a study on three partial cutting operations in interior British Columbia, specifically small patch, patch, and shelterwood harvesting. The study provided information about the harvesting operations' productivities and costs. Results of the residual damage survey are presented. Suggestions for implementation during future partial cutting operations are given.
From 1997-1998, the Forest Engineering Research Institute of Canada (FERIC) conducted a partial cutting study in an immature hemlock stand in coastal British Columbia. The two partial cutting options used were commercial thinning and shelterwood harvesting. The results are presented in this report and include information on productvity and costs of the cable and ground-based harvesting systems used, effectiveness of falling and yarding techniques for the treatments, and information on post-harvest disturbance, wind damage, and residual tree wounding.
In November 2000, FERIC initiated a short-term study to estimate productivity and costs for operational tree marking activities in the three uniform shelterwood cutblocks near William Lake, B.C. This report documents the results.
During the summer of 1997/98 and 1998/99, Weldwood of Canada Limited Hinton Division conducted partial cutting trials in riparian forests adjacent to the McLoed River near Hinton, Alberta. FERIC monitored the harvesting operations to determine harvesting productivities and costs, and to assess the operational suitability of using mechanized harvesting systems for partial cutting in riparian areas. Ways to improve productivity and decrease residual stand damage are suggested.