Download or read book Height Growth Response of Interior Spruce and Lodgepole Pine to Various Site Treatments in the Sub boreal Spruce Biogeoclimatic Zone written by Clifford Stanley Robertson and published by . This book was released on 1999 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Long term Results from EP841 written by Teresa A. Newsome and published by . This book was released on 2016 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Condition Growth and Projected Yield of Lodgepole Pine and Interior Spruce 20 Years After Rehabilitation of an Understocked Site in North central British Columbia written by Roger J. Whitehead and published by . This book was released on 2011 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Stony Lake trial was established in 1987 to benchmark growth performance of interior spruce and lodgepole pine planted into 12 treatment regimes for rehabilitating an understocked sub-boreal spruce site. All combinations of three options for primary site clearing treatments (burn, spray and burn, or windrow), two options for secondary site preparation treatments (disc-trenching or no disc-trenching), and two options for tertiary weeding treatments (broadcast application of herbicide three years after planting or no treatment) were tested. The objectives of this report were to 1) document the status of interior spruce and lodgepole pine trees planted into the 12 treatment regimes at the Stony Lake long-term research trial and 2) use these early growth data to customize Tree and Stand Simulator (TASS) runs to project potential impact on yield and expected value at rotation.--Includes text from document.

Download or read book Effects of Intensive Fertilization on the Foliar Nutrition and Growth of Young Lodgepole Pine Forests in the British Columbia Interior written by Robert Peter Brockley and published by . This book was released on 2010 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning in 1992, the British Columbia Ministry of Forests established a small network of lodgepole pine and interior spruce nutrient optimization research installations on representative sites within three major biogeoclimatic (BEC) zones in the British Columbia Interior. The objectives of the long-term "maximum productivity" study are to (1) compare the effects of different regimes and frequencies of repeated fertilization on the foliar nutrition, growth, and development of young interior forests, and (2) determine the effects of large nutrient additions on above- and below-ground timber and non-timber resources. This report examines the effects of repeated fertilization on foliar nutrition and tree- and stand-level growth and development over 12 years at the five lodgepole pine study sites.--Document.

Download or read book Nine year Response of Lodgepole Pine and the Dry Alder Complex to Chemical and Manual Release Treatments on an ICHmk1 Site Near Kelowna written by Suzanne Simard and published by . This book was released on 1996 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes a research trial established in 1986 in southern interior British Columbia to study the effectiveness of glyphosate applied at three and at six litres/hectare, and of manual cutting, to release naturally regenerated lodgepole pine seedlings and suppress dry alder complex. Pine seedlings and two target species, Sitka alder and fireweed, were assessed for the first three years and again in the ninth year following treatment. Measurements made on the seedlings included height, current-year height increment, and stem diameter at root collar. Target vegetation was assessed for species-specific percent cover and the height of one average target specimen per woody species was also measured.

Download or read book Understory Tree Release Following Harvest Cutting in Spruce fir Forests of the Intermountain West written by Ward W. McCaughey and published by . This book was released on 1982 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Early Effects of Manipulating Aspen Density and Special Arrangement on Lodgepole Pine Performance Aspen Sucker Production and Stand Development in an 11 year Old Stand in the SBPSxc Subzone of South central British Columbia written by Teresa A. Newsome and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixtures of trembling aspen (Populus tremuloides Michx.) and lodgepole pine (Pinus contorta var. latifolia Engelm.) regenerate naturally throughout the Sub-Boreal Pine-Spruce (SBPS), Interior Douglas-fir (IDF), Sub-Boreal Spruce (SBS), and Interior Cedar-Hemlock (ICH) zones in the Cariboo-Chilcotin area of the Southern Interior Forest Region. Due to the rapid height growth and high initial sucker densities of young aspen, these stands generally require some management at the juvenile stage to meet conifer growth objectives. Strategies designed to lessen competition from young aspen have become more complex over the past decade. In light of current understanding of the importance of broadleaf tree species to overall ecosystem health, successful management of young pine-aspen stands now requires practitioners to find a balance between removing aspen to meet lodgepole pine growth objectives and retaining as much aspen as possible to preserve the ecosystem benefits conferred by broadleaf species, reduce suckering, and reduce silviculture treatment costs. The Clusko aspen removal study, established in 2001 in an 11-year-old lodgepole pine-trembling aspen stand in the SBPSxc subzone, investigates the effects of five levels of aspen removal on target pine, neighbourhood competitive interactions, and stand development. Treatments include: (1) an untreated control; (2) complete aspen removal; broadcast retention of (3) 1000 and (4) 2500 aspen stems ha-1; and (5) a spatial treatment that removed aspen within a 1-m radius around target pine. This report presents second-year results from the Clusko River (Clusko) study.

Download or read book Use of Site Factors to Predict Lodgepole Pine and Interior Spruce Site Index in the Sub boreal Spruce Zone written by and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Site index is the measure of a given tree species' productivity. Relationships between site index & ecological site quality have been the focus of recent research efforts in British Columbia that have used categorical measures of ecological site quality to explain the variation in site index of major tree species. This report describes a study that expands these efforts to lodgepole pine & interior spruce. To establish a link between ecological site quality & forest productivity in the sub-boreal spruce zone of the Prince Rupert Forest Region, site index & site data were obtained from 93 lodgepole pine stands and 77 interior spruce stands distributed across two climatic regimes, eight soil moisture regimes, and five soil nutrient regimes. These regimes were used as categorical variables to stratify the stands and in the subsequent regression analysis of the data. Six types of regression models were developed and one model, which showed strong relationships between site index & some ecological parameters, was used to draft site index isolines which were then superimposed onto edatopic grids. The results test the capability of estimates of soil moisture & soil nutrient regimes as predictors of pine & spruce site index.

Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 2009 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Brushing and Grazing Effects on Lodgepole Pine Vascular Plants and Range Forage in Three Plant Communities in the Southern Interior of British Columbia written by Suzanne Simard and published by University of British Columbia Press. This book was released on 1998 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of research trials established in 1986-87 in the Kamloops Forest Region, British Columbia, studied the effectiveness of chemical and manual treatment methods for controlling competing vegetation, and also studied the impact that these brushing methods had on the range resource in the region. This report first describes the study methodology, including site selection, experimental design, measurements made, and statistical analyses. It then reports the results of the three studies in the series: the effects of brushing and grazing on lodgepole pine, the dry alder plant community, and range forage at the Devick Lake site; effects of brushing and grazing on lodgepole pine, the willow plant community, and range forage at the Ellis Creek site; and effects of brushing on lodgepole pine, the pinegrass plant community, and range forage at the Upper McKay Creek site.

Download or read book Stand tending and Rehabilitation Treatment Options for 36 year old Height repressed Lodgepole Pine written by Teresa A. Newsome and published by . This book was released on 2003 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest fires facilitate natural regeneration in lodgepole pine, but the pine stands that regenerate after wildfires are often very dense, which usually limits height growth. Such stands are said to be height repressed. One option for treating such stands to reduce or reverse height repression is to use silviculture treatments. This report presents preliminary (third-year) findings of a trial that is testing stand-tending & rehabilitation treatments in a 36-year-old, height-repressed lodgepole pine stand in southern interior British Columbia. The objective of the trial is to determine what regime might provide the most cost-effective means of increasing timber productivity. Treatments tested include fertilization, thinning, thinning followed by fertilization, and replacement of the existing stand.

Download or read book Early Effects of Manipulating Aspen Density on Lodgepole Pine Performance Aspen Sucker Production and Stand Development in the IDFxm Subzone Near Williams Lake B C written by Teresa A. Newsome and published by . This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trembling aspen (Populus tremuloides Michx.) is a common component of forests throughout interior British Columbia, particularly in north and central parts of the province. In the Cariboo-Chilcotin area of the Southern Interior Forest Region, aspen commonly regenerates along with planted and natural lodgepole pine (Pinus contorta var. latifolia Engelm.) in the Interior Douglas-fir (IDF), Sub-Boreal Spruce (SBS), Sub-Boreal Pine-Spruce (SBPS), and Interior Cedar-Hemlock (ICH) biogeoclimatic zones. Although aspen can be a strong competitor with shade-intolerant pine, maintaining a low-density aspen component within stands offers many benefits to both individual conifers and the site as a whole. Until recently, managing aspen included reducing its presence among young pine as much as possible by applying aggressive site preparation and brushing treatments. While strategies for managing mixed broadleaf-conifer stands are now changing throughout British Columbia, forest practitioners still require information about threshold levels of broadleaves that can be retained without seriously affecting conifer performance. A retrospective study to investigate the effects of aspen competition on lodgepole pine in the Cariboo region was established in 1992 and, by 1997, results were suggesting that dry-belt (IDFdk) thresholds for aspen as tall or taller than target pine were in the range of 2000-5000 stems ha-1. To investigate pine-aspen interactions further and to more clearly define thresholds for aspen retention in the Cariboo-Chilcotin dry-belt, a variable density study was established in 1998 at a site near Meldrum Creek in the IDFxm subzone. This technical report presents 4th-year results of that study.

Download or read book Lodgepole Pine Response to Aspen Removal in Variable Radii in the SBSdw2 Variant Near Williams Lake B C written by Teresa A. Newsome and published by British Columbia, Forest Science Program. This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed forests of lodgepole pine (Pinus contorta var. latifolia Engelm.) and trembling aspen (Populus tremuloides Michx.) are common throughout interior British Columbia, particularly in north and central areas of the province. In the Cariboo-Chilcotin area of the Southern Interior Forest Region, aspen commonly regenerates along with planted and natural lodgepole pine in the Sub-Boreal Spruce (SBS), Interior Douglas-fir (IDF), Sub-Boreal Pine-Spruce (SBPS), and Interior Cedar-Hemlock (ICH) zones. Historically, aspen has been regarded as a "weed" that competes with conifers, but silviculturists now recognize that there are many benefits to maintaining a broadleaf component within stands. A study was established in 1994 in the SBSdw2 variant of the Cariboo-Chilcotin region of the Southern Interior Forest Region to investigate the effects of removing aspen in 50 or 100 cm radii around crop lodgepole pine versus broadcast removal or no treatment. The primary objective of the study was to assess whether the free-growing criterion (current in 1994), which specified that no overtopping vegetation could be present within a 1 m radius around crop trees, was appropriate in pine-aspen stands, or whether a 50 cm radius zone would be adequate.

Download or read book Competition Among Lodgepole Pine Seedlings and Plant Species in a Sitka alder Dominated Shrub Community in the Southern Interior of British Columbia written by Suzanne W. Simard and published by . This book was released on 1988 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sitka alder (Alnus sinuata (Regel) Rydb.) dominates many lodgepole pine (Pinus contorta ssp. latifolia Dougl.) sites following clearcutting in the Montane Spruce zone of the southern interior of British Columbia. The objectives of this study were to examine the effects of the sitka alder-dominated shrub community on the performance of lodgepole pine and levels of environmental resources and conditions. Competitive interactions were examined in two studies: (1) among two year-old planted seedlings and plant species in various experimentally created shrub densities (0 to 2514 clumps/ha) and herb covers (0 to 100%), and (2) among eight year-old naturally regenerated saplings and plant species in an undisturbed community. In the first study, survival of seedlings among the experimentally created competition levels was 86% two years after planting. The main causes of mortality were drought and browsing by hares (Lepus sp.). Survival rate was not significantly affected by shrub and herb densities; however, survival was lowest where all vegetation had been removed. Seedling mortality in the total removal treatment may have been the result of high radiation loads and low moisture availability immediately following planting. Mean seedling size in the plantation was negatively affected by shrub and herb density. Stem diameter was the most responsive performance measure, smaller on average by 25% when seedlings were growing among maximum shrub and herb densities as compared with those growing free of competition. Height, in contrast, increased as shrub and herb densities increased. The decrease in diameter and increase in height in response to increasing vegetative competition reflected patterns in resource (particularly carbon) allocation. Several environmental factors were important to the enhancement of seedling water uptake and growth when competing vegetation was removed. Significant increases in seedling water uptake did not coincide with increases in soil water potential, but rather with increases in soil temperatures. Increases in seedling diameter corresponded with increased soil and air temperatures, light availability and mineralizable NO3-N. Individual seedling size in the plantation decreased with increasing amounts of neighboring plants. Visual estimates of percent cover of neighboring plants (extensive interspecific competition indices) explained more variation in pine size than did the more detailed measurements of alder size and proximity (intensive indices). Percent cover of all shrubs and herbs accounted for 16% of the variation in height:diameter ratio while angular dispersion and distance to neighboring sitka alder accounted for only 9%. A competition threshold, i.e. the amount of neighboring vegetation at which competition began and growth was limited, was not identified. Seedlings with the largest stem diameters, however, occurred in neighborhoods with less than 10% cover of herbs and shrubs each. The best multiple regression models developed explained 22% of the variation in pine diameter and 43% of the variation in height. The independent variables were initial height, seedling vigour, browsing damage and percent cover of all shrubs. Light and, to a lesser degree, soil water available to seedlings were reduced by neighboring vegetation. Within the experimentally created competition levels, sitka alder clumps sprouted to a mean height of 70 cm and mean diameter of 73 cm two growing seasons after manual cutting. The tallest stems (125 cm) reached 42% of the pre-treatment height (3 m). The density of sprouting alder clumps had a significant effect on the development of most neighboring shrub and herb species. Percent cover of alder, thimbleberry (Rubus parviflorus), fireweed (Epilobium angustifoliuin) and pinegrass (Calamagrostis rubescens) was greatest in the intermediate density range of 1258 to 1886 clumps/ha. Within this density range, threshold levels of environmental resources and conditions may have been reached which resulted in the greatest vegetative cover. Two growing seasons after planting, all neighboring species except grouseberry (Vacciniwn scoparium) were overtopping pine seedlings. In the second study of a 10 year-old undisturbed sitka alder dominated community, two vegetation types were identified. Type I was dominated by lodgepole pine and pinegrass while type II was dominated by sitka alder, thimbleberry and black huckleberry (Vaccinium membranaceum). The size of individual pine saplings was more negatively affected by neighboring plants in type II than I. Sitka alder, of all the dominant species in the undisturbed community, had the greatest competitive effect on pine size. The extensive competition index, percent cover of sitka alder, explained 45% of the variation in stem diameter. In contrast, the intensive indices, height of and distance to neighboring sitka alders, together explained 40% of the variation in stem diameter. A clearly defined competition threshold was not identified. Rather, pine size increased linearly as sitka alder densities decreased. Sitka alder had a negative effect on light availability to pine, particularly in type II.

Download or read book Competitive Effects of Trembling Aspen on Lodgepole Pine Performance in the SBS and IDF Zones of the Cariboo Chilcotin Region of South central British Columbia written by Teresa A. Newsome and published by . This book was released on 2003 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes & presents results of a retrospective study carried out between 1992 and 1999 in the Cariboo-Chilcotin region of British Columbia to quantify the effects of trembling aspen competition on lodgepole pine performance, and to identify competition indices or other measures of competition that could be used by field staff. Target pine were selected across neighbourhoods in six stands with varying densities of aspen. Data pertaining to pine size & condition, and to the size & location of aspen within a 70-inch radius of the pine were collected three times. Measurements began when the stands were seven to 12 years old. Various approaches are used to identify levels of aspen abundance when pine performance declined below acceptable levels. These include analyses of regression & correlation, tests of existing competition indices, and visual & statistical characterization of trends. Finally, conservative recommendations are made for the retention of aspen within pine stands in the Cariboo-Chilcotin region.

Download or read book FRDA Report written by and published by . This book was released on 1996 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Factors Influencing the Choice Between Natural Regeneration and Planting of Lodgepole Pine in the Sub boreal Pine spruce Zone written by Erin Victoria Moore and published by . This book was released on 2000 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: