Effect On Mechanical Site Preparation And Fencing On Five Year Growth Of Douglas Fir And Lodgepole Pine Seedlings Planted On Dry Sites In The Cariboo Forest Region

Author : N. Daintith,Canada-British Columbia Partnership Agreement on Forest Resource Development: FRDA II.,Teresa A. Newsome,T. H. Newsome,British Columbia. Ministry of Forests,Canada British Columbia Partnership Agreement on Forest Resource Development,Canadian Forest Service
Publisher : Unknown
Page : 17 pages
File Size : 51,9 Mb
Release : 1996-10
Category : Douglas fir
ISBN : 0772629609

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Effect on Mechanical Site Preparation and Fencing on Five-Year Growth of Douglas-Fir and Lodgepole Pine Seedlings Planted on Dry Sites in the Cariboo Forest Region by N. Daintith,Canada-British Columbia Partnership Agreement on Forest Resource Development: FRDA II.,Teresa A. Newsome,T. H. Newsome,British Columbia. Ministry of Forests,Canada British Columbia Partnership Agreement on Forest Resource Development,Canadian Forest Service Pdf

Douglas fir plantations are difficult to establish in clear-cut openings in dry subzones in the Cariboo Forest Region of British Columbia. This study tested four mechanical site preparation treatments as methods for reducing environmental stresses and discouraging cattle use, thereby improving seedling survival and growth. It was conducted for both Douglas fir and lodgepole pine seedlings, on grazed and ungrazed areas of clearcuts in the interior Douglas fir and sub-boreal spruce biogeoclimatic zones of the Region. Investigators established a smooth wire enclosure on each of the two test sites; within the enclosure and on adjacent ground outside, they tested four site preparation treatments: V-plow, ripper plow, V-plow and ripper plow combination, and control. Seedling microclimate was monitored for three growing seasons. This report includes data on fifth-year seedling survival and condition, total height growth (1988-92), and diameter growth (1989-92).

Author : Alan Vyse
Publisher : Unknown
Page : 318 pages
File Size : 49,8 Mb
Release : 1998
Category : Douglas fir
ISBN : MINN:31951D019350118

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Managing the Dry Douglas-fir Forests of the Southern Interior by Alan Vyse Pdf

Workshop was organized to provide researchers with a forum to share research results, identify gaps, and set priorities for the future. Proceedings provide managers of dry Douglas-fir forests with an accessible source of information about the forest type.

Author : M. J. Waterhouse,A. M. Eastham,British Columbia. Forest Science Program
Publisher : British Columbia Forest Science Program
Page : 56 pages
File Size : 41,8 Mb
Release : 2005
Category : Douglas fir
ISBN : MINN:31951D02057781S

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Assessment of Silvicultural Systems Developed for Deep Snowpack Mule Deer Winter Range in the Central Interior of B.C. by M. J. Waterhouse,A. M. Eastham,British Columbia. Forest Science Program Pdf

"In the central interior of British Columbia (Southern Interior Forest Region), Douglas-fir (Pseudotsuga menziesii) tends to occur in even-aged stands in the Interior Cedar-Hemlock Moist, Cool, Horsefly biogeoclimatic variant (ICHmk3). Douglas-fir stands are important from both forest industry and wildlife habitat management perspectives. Mule deer require mature and older Douglas-fir stands as winter range. In these ecosystems, Douglas-fir stands are typically clearcut, thereby seriously compromising habitat value as winter range. This is a pilot study to examine the response of vegetation (percent cover) and Douglas-fir regeneration (density and growth) to a range of opening sizes, opening orientation (along and across contours), and site preparation treatment (yes or no), 5 years post-harvest. The openings (15 165 m [0.25 ha], 30 165 m [0.5 ha], 60 165 m [1.0 ha], 60 330 m and 140 140 m [2.0 ha]) are options for group selection, patch cut, or clearcut silvicultural systems. Although most of the 19 tree, shrub, and grass species that mule deer could eat did not change in percent cover from pre-harvest to 5 years postharvest, the species that did change were most strongly affected by harvesting, not opening size. A major diet component, western redcedar (Thuja plicata), was reduced from 9.6 to 1.4% in the site-prepared openings, and from 9.4 to 3.9% in the openings not site-prepared, when comparing the pre-harvest to the 5th-year post-harvest assessment. However, in the 5 years since harvesting, this species has increased from 533 stems per ha to 783 stems per ha (47%) and should increase steadily in cover over time. Of note was a big increase in red raspberry (Rubus idaeus) (from 0.1% up to 14%) and a moderate increase in birch-leaved spirea (Spirea betufolia) (from 1% up to 6%); however, they generally occur in small amounts (

Author : Anonim
Publisher : Unknown
Page : 464 pages
File Size : 52,5 Mb
Release : 1985
Category : Forests and forestry
ISBN : MINN:31951P00639019P

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Information Report by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 2312 pages
File Size : 54,9 Mb
Release : 1998
Category : Agriculture
ISBN : OSU:32435057418188

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Bibliography of Agriculture by Anonim Pdf

Author : Canadian Forest Service
Publisher : Unknown
Page : 56 pages
File Size : 54,6 Mb
Release : 1996
Category : Forests and forestry
ISBN : PSU:000063618969

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Abrégé Des Publications by Canadian Forest Service Pdf

Author : Anonim
Publisher : Unknown
Page : 638 pages
File Size : 53,8 Mb
Release : 1996
Category : Forests and forestry
ISBN : MINN:31951P00502864C

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FRDA Report by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 318 pages
File Size : 46,8 Mb
Release : 1996
Category : Government publications
ISBN : UCBK:C059220856

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British Columbia Government Publications by Anonim Pdf

Author : John McClarnon
Publisher : Unknown
Page : 62 pages
File Size : 54,9 Mb
Release : 2016
Category : Forest site preparation
ISBN : UCBK:C112305924

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Lodgepole Pine Responses to Mechanical Site Preparation and Burning in Sub-boreal British Columbia by John McClarnon Pdf

In 1988, three studies were established as part of Experimental Project 995 to study lodgepole pine (Pinus contorta var. latifolia) survival and growth responses to site preparation in the Sub-Boreal Spruce zone of north-central British Columbia. The project examines the effectiveness of several mechanical treatments and localized high-intensity burning, with a focus on disc trenching, which is the most commonly used mechanical site preparation technique in this region. The importance of disc trench orientation, planting aspect, and planting position were investigated, as well as potential interactions between broadcast burning and disc trenching. This report presents 25-year results for the Bednesti North and Bednesti South experiments, and 19-year results for the Tanli experiment. Treatment effects are discussed in relation to: lodgepole pine establishment (survival and early growth to age 5); performance at approximately free-growing age (9 years); and early mid-term growth, stand volume, and site index (as measured at age 25). Of the mechanical treatments tested, coarse mixing was the most effective, resulting in approximately 1-m gains in lodgepole pine height over the control at age 25. This treatment is not practical from an operational perspective, however, and the more common technique of disc trenching with trees planted at the hinge produced the second greatest gains. In contrast, pine planted in trench furrows showed a trend of reduced growth relative to the control. Trench orientation was relatively unimportant, but there was a slight advantage to avoiding north-aspect planting positions. Although broadcast burning alone did not have a significant effect on pine growth, it consistently interacted with disc trenching to produce a mild magnification of responses to that treatment. Pine planted in long, narrow, intensely burned windrow strips were consistently larger than control pine throughout the 25-year assessment period, but they had poor form due to being essentially open-grown.

Author : Pacific Forestry Centre,E. F. Wass,R. B. (Richard Barrie) Smith
Publisher : Unknown
Page : 22 pages
File Size : 45,9 Mb
Release : 1994
Category : Douglas fir
ISBN : 0662224787

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Impacts of Soil Disturbance on Root Systems of Douglas-fir and Lodgepole Pine Seedlings by Pacific Forestry Centre,E. F. Wass,R. B. (Richard Barrie) Smith Pdf

Author : Richard Barrie Smith,Pacific Forestry Centre,E. F. Wass
Publisher : Unknown
Page : 36 pages
File Size : 48,6 Mb
Release : 1994
Category : Technology & Engineering
ISBN : MSU:31293010111569

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Impacts of Skidroads on Properties of a Calcareous, Loamy Soil and on Planted Seedling Performance by Richard Barrie Smith,Pacific Forestry Centre,E. F. Wass Pdf

A plantation consisting of three plots with 160 seedlings each of Douglas-fir (Pseudotsuga menziesii) and lodgepole pine (Pinus contorta var. latifolia) was established in a cutover north of Golden, British Columbia, in the Interior Cedar-Hemlock biogeoclimatic zone. To determine the impact of contour-built skidroads on survival and subsequent growth of planted seedlings, plots straddled selected segments of the skidroads. Seedlings were planted in four disturbance categories on the skidroads and in undisturbed soil above and below the skidroads. Soil characteristics were measured initially on the skidroads and in the undisturbed soil adjacent to the skidroads and tree growth was monitored for eight growing seasons after planting. Foliage was sampled for nutrient content at the end of the fifth year.‍?The greatest adverse impacts on the soil were found in the inner track, i.e., the portion of the skidroads lying next to the cutbank. Here, the top 20 cm of mineral soil was on average 52% denser and 62% more resistant to penetration than the equivalent depth of undisturbed mineral soil. Soils in the outer track were also seriously degraded whereas the soils in the berm were not markedly different from the undisturbed situation in terms of density and penetrability. Disturbance exposed subsoil with inherently higher levels of free carbonates and a pH range of 6.3-7.0 compared with an average of 5.3 for the upper portion of undisturbed soil. ‍?Survival of Douglas-fir seedlings was significantly greater on the skidroad surface than on sidecast or undisturbed soil. However, growth of both Douglas-fir and lodgepole pine was reduced on skidroads, particularly in the inner track; reductions 5 years after planting amounted to 33% in height and 53% in volume for Douglas-fir and 32% and 48%, respectively, for lodgepole pine. After 8 years reductions were generally less, amounting to 25% in height and 38% in volume for Douglas-fir and 26% and 49%, respectively, for lodgepole pine. Growth of seedlings planted in the sidecast and berm was not significantly different than in undisturbed soil. The distinct character of the inner track was evident also by a relatively slow development of vegetation and by a composition of plant species dissimilar from that found on other parts of the skidroad or on undisturbed ground.‍?Correlations are made among soil and seedling growth characteristics to explain some of the results and to guide further research.

Author : O. A. Steen,H. M. Armleder
Publisher : University of British Columbia Press
Page : 34 pages
File Size : 46,8 Mb
Release : 2008
Category : Douglas fir
ISBN : MINN:31951D028270957

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Managing Ingrown Douglas-fir Stands for Biodiversity, Forage and Timber by O. A. Steen,H. M. Armleder Pdf

The Farwell Canyon project was established to explore treatment options for enhancing undergrowth vegetation cover, forage production, and tree growth in densely ingrown Douglas-fir stands of the Interior Douglas-fir very dry mild (IDFxm) biogeoclimatic subzone. Fire scar and tree age analyses along with stand structure observations suggest that many of these ingrown stands were considerably more open before European settlement. Stem reduction treatments applied to two ingrown sites in 200 included logging only (L), logging plus juvenile thinning (LT), and logging plus thinning plus underburning (LTB). No-treatment (NT) areas were also established. The logging treatment was modified from standard practices to harvest small merchantable stems and to initiate thinning of juvenile stems. The objective of this report is to compare third- and fifth-year (2003 vs. 2006) vegetation composition, forage production, and tree regeneration responses to these treatments on one site. Douglas-fir regeneration density increased in all treatments between 2003 and 2006. Cover of grasses increased substantially, due primarily to increased cover of pinegrass (Calamagrostis rubescens). The number of plots with bunchgrasses increased even though mean cover of bunchgrasses did not increase significantly. Shrub and forb cover remained generally low on all treatments. Biomass of combined forbs and graminoids increased significantly from 2003 to 2006 but did not differ significantly among treatments. These early results suggest that the logging treatment, with or without additional treatments, is leading to increased vascular plant cover and forage production. Tree regeneration density is still relatively low. The thinning and underburning treatments have reduced the fire hazard and prepared the stand for follow-up treatments to maintain a more open stand structure. The stand treatments applied in this study should be combined with other treatments to create various stand structures across the IDFxm landscape,corresponding to historic variability of disturbances within the IDFxm subzone.

Author : Allan Dobb
Publisher : Unknown
Page : 128 pages
File Size : 47,6 Mb
Release : 2013
Category : Range management
ISBN : 0772666431

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British Columbia Rangeland Seeding Manual by Allan Dobb Pdf

Author : Richard Barrie Smith,Pacific Forestry Centre,E. F. Wass
Publisher : Unknown
Page : 32 pages
File Size : 49,6 Mb
Release : 1994
Category : Technology & Engineering
ISBN : MSU:31293010111650

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Impacts of a Stump Uprooting Operation on Properties of a Calcareous Loamy Soil and on Planted Seedling Performance by Richard Barrie Smith,Pacific Forestry Centre,E. F. Wass Pdf

To ascertain the impacts of stump uprooting operations conducted to control the spread of root disease on site productivity, 600 Douglas-fir and 600 lodgepole pine seedlings were planted on seven plots in a cutover north of Golden, British Columbia. Equal numbers of trees were planted on tracks and deposits created during stump uprooting, and on undisturbed ground, as confirmed by the presence of an intact humus layer. Soil characteristics were measured initially on disturbed and undisturbed portions of the cutover, and tree growth was monitored for eight growing seasons after planting. Foliage was sampled for nutrient content after the fifth year. Comparisons of productivity impacts resulting from uprooting stumps and from other forestry operations were made.

Author : Robert Peter Brockley,British Columbia. Forest Science Program
Publisher : University of British Columbia Press
Page : 68 pages
File Size : 45,9 Mb
Release : 2006
Category : Douglas fir
ISBN : MINN:31951D02339294K

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Effects of Fertilization on the Growth and Foliar Nutrition of Immature Douglas-fir in the Interior Cedar-hemlock Zone of British Columbia by Robert Peter Brockley,British Columbia. Forest Science Program Pdf

"The effects of fertilization with nitrogen (N) alone, and in combination with sulphur (S), on the growth and foliar nutrition of six immature, managed Douglas-fir (Pseudotsuga menziesii var. glauca [Beissn.] Franco) stands in the Interior Cedar-Hemlock (ICH) biogeoclimatic zone of British Columbia are reported 6 years after treatment. Results indicate that interior Douglas-fir stands growing on circummesic sites within the ICH zone are generally responsive to fertilization. Disregarding results from one installation that was damaged by Armillaria root disease, average net volume response following fertilization with N alone was 13.5 m3/ha (range: 6.5-24 m3/ha) compared to the control treatment. Six-year volume gains from N+S additions averaged 16 m3/ha (range: 10-23 m3/ha). In relative terms, stand volume responses to fertilization with N and N+S averaged 24% (range: 8-41%) and 28% (range: 16-39%), respectively. Growth projections generated by the tipsy growth and yield program indicate that the accelerated stand development following a single fertilizer application will likely reduce biological rotations (i.e., culmination of mean annual increment) and technical rotations (e.g., minimum harvestable age) by 2-3 years. Relative growth responses compare favourably with results from Douglas-fir fertilization studies in other jurisdictions.‍?‍?Pre- and post-fertilization foliar nutrient analyses indicate that several of the sites were marginally S deficient, and that S status deteriorated 1 year following N fertilization. Added S was readily taken up, thereby maintaining a favourable N:S balance in trees fertilized with N+S. Despite improvements in foliar S status, the incremental growth benefits of added S may be too small on most sites to justify the extra expense involved in blending and applying N+S fertilizers in large-scale aerial operations.‍?‍?Results from this study, and others, indicate that pre-fertilization levels of foliar N and sulphate S (SO4) may have utility in selecting candidate stands and in making appropriate fertilizer prescriptions. For example, the largest growth responses following fertilization may be expected in stands with pre-fertilization foliar N levels less than 11.5 g/kg ( 13 g/kg when using dry combustion analytical methods). Also, low foliar N combined with small amounts of pre-fertilization foliar SO4 (