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Operational Implementation of a Commercial Thinning Trial Using Micro-Forestry Equipment
This document details a 2024 commercial thinning trial conducted by Burns Lake Community Forest in British Columbia, using specialized micro-forestry equipment to improve stand health and reduce wildfire risk. By using smaller harvesters and forwarde...This document details a 2024 commercial thinning trial conducted by Burns Lake Community Forest in British Columbia, using specialized micro-forestry equipment to improve stand health and reduce wildfire risk. By using smaller harvesters and forwarders, the project aimed to minimize soil disturbance and tree damage while thinning from below to remove suppressed or defective stems. The document outlines a rigorous scientific framework, comparing different tree-marking strategies and machine trail layouts to determine the most efficient way to achieve a specific target basal area. This document provides operational guidance for implementing low-impact silviculture, providing data on machine productivity, financial feasibility, and the ecological benefits of enhancing species diversity in managed forests. -
Effects of Low Levels of Dispersed Retention on the Growth and Survival of Young Planted Douglas-Fir
This document investigates how leaving different amounts of mature tree cover during timber harvests affects the development of newly replanted Douglas-fir in coastal British Columbia. By comparing various levels of dispersed retention, ranging from ...This document investigates how leaving different amounts of mature tree cover during timber harvests affects the development of newly replanted Douglas-fir in coastal British Columbia. By comparing various levels of dispersed retention, ranging from clearcuts to 30% forest cover, the researchers tracked the height, diameter, and survival rates of young trees over a 5-6 year period. The results demonstrated that while most lower retention levels did not hinder early growth, a statistically significant reduction in stem diameter occurred at the 30% retention level, likely due to decreased light availability. This document suggests that while higher levels of forest structure may slightly slow development, young Douglas-fir can remain resilient and viable under moderate levels of overstory shade. -
Salal Cedar Hemlock Integrated Research Program Research Update 2 - Silvicultural Practices for Regeneration of Cedar-Hemlock Sites in Coastal British Columbia
This document details the long-term findings of the Salal Cedar Hemlock Integrated Research Program, which investigated why certain conifer plantations in coastal British Columbia experience stunted growth. The study focuses on nutrient deficiencies ...This document details the long-term findings of the Salal Cedar Hemlock Integrated Research Program, which investigated why certain conifer plantations in coastal British Columbia experience stunted growth. The study focuses on nutrient deficiencies caused by the competitive reinvasion of salal, an aggressive shrub that thrives after clearcutting and limits the availability of nitrogen and phosphorus to young trees. Through various silvicultural trials, the authors demonstrate that combined nitrogen and phosphorus fertilization significantly boosts the productivity of Sitka spruce and western hemlock, while western redcedar shows a stronger response to the manual or chemical removal of salal. Additionally, the research explored alternative strategies such as using lodgepole pine as a nurse species and applying organic fertilizers like biosolids and fish silage, which offered growth benefits comparable to inorganic options. -
A Field Guide to Regeneration of Salal-Dominated Cedar-Hemlock (CH) Sites in the CWHvm
This field guide provides a comprehensive framework for addressing regeneration failure on coastal old-growth cedar-hemlock sites in British Columbia, where the aggressive expansion of salal shrubs creates severe nutrient deficiencies. The document i...This field guide provides a comprehensive framework for addressing regeneration failure on coastal old-growth cedar-hemlock sites in British Columbia, where the aggressive expansion of salal shrubs creates severe nutrient deficiencies. The document identifies the primary obstacle as a lack of available nitrogen and phosphorus caused by the unique chemistry of cedar litter and the interference of salal tannins in soil processes. To overcome this, the guide advocates for a silvicultural strategy focused on achieving rapid crown closure through a combination of clearcutting, mechanical site preparation or burning, and the use of high-quality planting stock. The author also emphasizes that targeted fertilization with both inorganic and organic materials is essential to sustain tree growth and eventually shade out competing vegetation. This guide serves as a practical manual for foresters to transform stagnant, nutrient-poor sites into productive, closed-canopy coniferous stands. -
How Extension Enhances the Knowledge and Practice of Innovative Silviculture in British Columbia Canada
This paper examines how extension, a dynamic process of knowledge exchange, can bridge the gap between scientific research and field application to support innovative silviculture in British Columbia. The authors outline a framework of five extension...This paper examines how extension, a dynamic process of knowledge exchange, can bridge the gap between scientific research and field application to support innovative silviculture in British Columbia. The authors outline a framework of five extension forms, ranging from one-way sharing to co-produced knowledge generation, designed to help foresters adapt to modern pressures such as climate change, wildfire severity, and the legal recognition of Indigenous Rights and Title. By reviewing the history of extension, this document acknowledges the field's colonial and anti-Indigenous origins while advocating for a future grounded in reciprocity and ethical collaboration. This document serves as a call to action for organizations to formally value and resource extension staff, ensuring that stewardship practices are effectively informed by a diverse range of social, economic, and ecological values. -
Testing Backlog Reforestation Options
FRDA Report #143 -
Forest Regeneration in the ESSFa Subzone - a Problem Analysis
This FRDA Report #118 investigates why forest regeneration often failed in British Columbia's ESSFa subzone between 1961 and 1985, leaving significant tracts of land in a state of unsatisfactory restocking. By analyzing historical data and conducting...This FRDA Report #118 investigates why forest regeneration often failed in British Columbia's ESSFa subzone between 1961 and 1985, leaving significant tracts of land in a state of unsatisfactory restocking. By analyzing historical data and conducting field assessments across 65 sites, the study identifies that environmental factors like elevation and moisture play a role and the lack of appropriate site preparation is a primary cause of poor seedling performance. The document is structured as a problem analysis that moves from geographical and climatic context to specific silvicultural recommendations, advocating for better species selection and increased investment in proactive land management. This document also serves as a guide for foresters to improve plantation success by aligning harvesting and planting techniques with the unique ecological demands of high-elevation environments. -
Effect of Manual Treatment Timing on Red Alder Regrowth and Conifer Response
This document details an investigation into the manual control of red alder to promote the growth of planted Douglas-fir and grand fir seedlings. By testing five different cutting schedules, researchers sought to determine if the timing of brush remo...This document details an investigation into the manual control of red alder to promote the growth of planted Douglas-fir and grand fir seedlings. By testing five different cutting schedules, researchers sought to determine if the timing of brush removal influenced how effectively it prevented the alder from resprouting and competing for resources. The study concludes that performing this work during the late growing season maximizes the death of the alder stumps while minimizing new growth, though environmental factors like moisture stress significantly impacted the overall health of both the deciduous and coniferous trees. -
FRDA Herbicide Applcation Followed by Prescribed Fire to Convert a Brushfield into a Conifer Plantation in South Coasal BC - a Comparison of the Intiial Effects of Two Treatments
This FRDA Report #146 evaluates the effectiveness of a brown and burn forest management strategy used to transform brush-heavy land in coastal British Columbia into productive conifer plantations. The study specifically compares the environmental imp...This FRDA Report #146 evaluates the effectiveness of a brown and burn forest management strategy used to transform brush-heavy land in coastal British Columbia into productive conifer plantations. The study specifically compares the environmental impacts and seedling growth outcomes of applying glyphosate herbicide either one year prior to or in the same year as a prescribed fire. By meticulously measuring nutrient status, soil properties, and vegetation regrowth, the author concludes that both methods are feasible for site rehabilitation and the earlier herbicide application generally led to greater fuel consumption and better suppression of competing plants. This document can assist with optimizing site preparation techniques to ensure the successful establishment of Douglas-fir seedlings in specific ecological subzones. -
Shelterwood Harvesting in Root Disease Infected Stands in Southeastern British Columbia - Three-Year Results
This document evaluates the early outcomes of using partial cutting and pushover harvesting to manage forest stands infected with root disease in southeastern British Columbia. The document is structured into three primary scientific inquiries: an as...This document evaluates the early outcomes of using partial cutting and pushover harvesting to manage forest stands infected with root disease in southeastern British Columbia. The document is structured into three primary scientific inquiries: an assessment of understory light availability, an analysis of forest litter decomposition, and a detailed study of seedling regeneration and survival. Key findings indicate that specialized harvesting techniques did not negatively impact tree health, however, there is a clear trend of increasing seedling growth as the remaining overstory density is reduced. -
Shelterwood Harvesting in Root Disease Infected Stands in Southeastern British Columbia - Post-Harvest Soil Disturbance
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Shelterwoods in Root Disease Infected Stands Preliminary Results
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IDF Strategy for Williams Lake and 100 Mile TSAs
This document details a silviculture strategy for the Interior Douglas-fir zones within British Columbia's Williams Lake and 100 Mile House regions. The report establishes a comprehensive framework for forest management by categorizing the landscape...This document details a silviculture strategy for the Interior Douglas-fir zones within British Columbia's Williams Lake and 100 Mile House regions. The report establishes a comprehensive framework for forest management by categorizing the landscape into working groups based on tree species and their role as critical mule deer winter habitat. The authors argue for a shift toward partial cutting systems and higher density planting to combat challenges like climate change, mountain pine beetle outbreaks, and stand stagnation. This document serves as a roadmap to improve timber productivity and ecological resilience through sixteen targeted recommendations, emphasizing the need for updated inventory data and adaptive management trials. -
Outplanting Performance of Western Redcedar Yellow-cedar and Douglas-fir in Montane Alternative Silvicultural Systems (MASS)
This document evaluates a decade of data from the Montane Alternative Silvicultural Systems project to determine how different timber harvesting methods affect the regeneration of non-dominant conifer species in British Columbia. By comparing variou...This document evaluates a decade of data from the Montane Alternative Silvicultural Systems project to determine how different timber harvesting methods affect the regeneration of non-dominant conifer species in British Columbia. By comparing various environments ranging from open clearcuts to high-density shelterwood retention, the study highlights how a species' unique ecological attributes and shade tolerance dictate its survival and growth in harsh, high-elevation climates. The findings suggest that yellow-cedar shows promise for reliable performance, and that low-elevation species like Douglas-fir and western redcedar struggle with poor survival or slow growth due to snowpack and frost. This document emphasized that successful reforestation requires matching specific tree types to the precise light and climatic conditions created by different harvesting strategies. -
The Effects of Planting Density on the Growth and Yield of Lodgepole Pine Interior Spruce Interior Douglas-fir and Western Larch - 16 to 26 Year Results from EP964
This technical report summarizes nearly three decades of research from Experimental Project 964, a large-scale study investigating how planting density influences the development of four major conifer species in British Columbia. By evaluating 17 dif...This technical report summarizes nearly three decades of research from Experimental Project 964, a large-scale study investigating how planting density influences the development of four major conifer species in British Columbia. By evaluating 17 different sites over 16 to 26 years, the authors analyze the critical trade-offs between individual tree size and total timber yield per hectare. The findings reveal that higher densities maximize total wood volume and biomass and lower densities produce thicker trees with less taper, though vertical height growth remains largely unaffected across all treatments. This document serves as a guide for forest managers to select optimal stocking levels based on specific commercial goals, such as high-value lumber production versus biomass for carbon credits. -
Effect of Sites and Provenances on 6th-year Performance of Noble Fir in Coastal British Columbia
This document investigates the six-year growth and survival of noble fir in coastal British Columbia, a region where the species does not occur naturally. By testing 23 different seed sources across 12 diverse locations, the author examines how vario...This document investigates the six-year growth and survival of noble fir in coastal British Columbia, a region where the species does not occur naturally. By testing 23 different seed sources across 12 diverse locations, the author examines how various environmental conditions and genetic origins influence the tree's performance. The findings indicate that while the species is highly productive and resilient in maritime climates, it remains vulnerable to frost in more continental settings. This document aims to identify ideal planting sites and superior seed sources to guide the successful introduction of noble fir for regional reforestation. -
Out on a Limb with Alkali Resource Management
Out On A Limb is a series that uplifts trailblazers in BC communities who are leading innovative management practices for the betterment of the forests of tomorrow. In this episode of Out on a Limb, the SIP joins Alkali Resource Management, which is ...Out On A Limb is a series that uplifts trailblazers in BC communities who are leading innovative management practices for the betterment of the forests of tomorrow. In this episode of Out on a Limb, the SIP joins Alkali Resource Management, which is 100% owned by Esk'etemc First Nation, and project partners from the Government of BC to learn more about the impacts and benefits of ARM's innovative approaches just south of Williams Lake, BC. Francis Johnson and Julian Paul walk through some ways ARM aims to create resilience in stands that possess dense understories of small trees, increasing wildfire risk, and decreasing suitability as wildlife habitat using partial harvest with clumpy spacing and prescribed burning to restore forest health and revitalize cultural uses and values. This collaborative project evaluates the efficacy of ARM's treatments on understory vegetation and wildlife use, wildfire risk, disturbance agents, and overall forest integrity and resiliency. By blending Indigenous stewardship, applied research, and on-the-ground treatments, the trial is generating valuable insights into how these forests can become more resilient to disturbance while supporting mule deer winter range, biodiversity, and culturally important plants. -
Influence of Spacing and Artificial Pruning on the Production of Clearwood of Douglas-fir
This document explores the economic and biological feasibility of managing second-growth Douglas-fir forests to ensure a future supply of high-quality clearwood. As old-growth harvests decline, the author uses field research and a specialized simulat...This document explores the economic and biological feasibility of managing second-growth Douglas-fir forests to ensure a future supply of high-quality clearwood. As old-growth harvests decline, the author uses field research and a specialized simulation model named PRUNE to examine how different initial spacing and artificial pruning techniques impact tree growth, branch diameter, and overall wood value. The document provides an extensive analysis of market trends and price structures in British Columbia, suggesting that early pruning of widely spaced trees offers the most promising return on investment for intensive forest management. This research can support foresters in optimizing the production of knot-free timber by balancing the costs of silvicultural interventions against the premium prices paid for superior wood grades. -
Laminated Root Disease Stand Establishment Decision Aid
This document provides forest managers with a framework for identifying and controlling laminated root disease within the southern interior of British Columbia. It details how the fungus Phellinus sulphurascens spreads through root contact, primarily...This document provides forest managers with a framework for identifying and controlling laminated root disease within the southern interior of British Columbia. It details how the fungus Phellinus sulphurascens spreads through root contact, primarily threatening Douglas-fir stands by causing significant wood decay, tree mortality, and windthrow. To mitigate these economic and ecological losses, the authors outline specialized silviculture strategies, such as the mechanical removal of infected stumps or the diversification of tree species toward those with lower susceptibility. Thsi document serves as a decision aid to help practitioners assess site hazards and implement intervention techniques that ensure long-term timber productivity and forest health. -
British Columbia's Southern Interior Forests Armillaria Root Disease Stand Establishment Decision Aid
This document serves as a strategic management guide for addressing Armillaria root disease within the diverse forests of British Columbia's southern interior. The authors outline how this fungal pathogen compromises forest productivity by killing yo...This document serves as a strategic management guide for addressing Armillaria root disease within the diverse forests of British Columbia's southern interior. The authors outline how this fungal pathogen compromises forest productivity by killing young conifers and hindering the growth of surviving trees, particularly in the Interior Cedar-Hemlock zone where inoculum is most prevalent. To help land managers mitigate these losses, the document provides a decision flowchart and updated host susceptibility ratings, emphasizing that the threat can be moderated through mechanical stump removal or by prioritizing the regeneration of resistant tree species.
