Impacts of a Stump Uprooting Operation on Properties of a Calcareous Loamy Soil and on Planted Seedling Performance PDF Download
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Author: Richard Barrie Smith Publisher: ISBN: Category : Technology & Engineering Languages : en Pages : 32
Book Description
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: Richard Barrie Smith Publisher: ISBN: Category : Technology & Engineering Languages : en Pages : 32
Book Description
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: Richard Barrie Smith Publisher: ISBN: Category : Technology & Engineering Languages : en Pages : 36
Book Description
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: Barbara Ellen Kishchuk Publisher: Canadian Forest Service, Northern Forestry Centre ISBN: Category : Calcareous soils Languages : en Pages : 36
Book Description
This report is a review of published literature on calcareous soils and their role in the productivity of coniferous forests in southwestern British Columbia and western Alberta. Definitions, origins, and properties of calcareous soils are described. Processes contributing to growth limitations on calcareous soils are reviewed. Chemical properties of calcareous soils may give rise to tree nutrition problems or other metabolic disturbances. Physical properties of calcareous soils may also affect tree growth through compacting or cementing effects. Factors controlling productivity on calcareous soils are discussed with particular reference to coniferous species in western Canada. Depth to carbonates in the soil profile appears to be an important factor in the establishment and productivity of coniferous stands in western Canada. Forest practices resulting in displacement of calcareous subsoils and implications of calcareous soil displacement are identified. Although instances where decreases in forest productivity on calcareous soils have been identified, calcareous soils do not appear to have a consistently adverse effect on productivity. Attributes of soils and other site factors must be identified to determine the role of calcareous soils in stand establishment and productivity.
Author: Paolo Gonthier Publisher: CABI ISBN: 1780640404 Category : Technology & Engineering Languages : en Pages : 681
Book Description
Today, forest health and the management of threats towards it are attracting more and more attention on a global scale. This book covers the most recent advances in the management of forest diseases, including the epidemiology and infection biology of forest pathogens, and forest protection based on integrated pest and disease management approaches. A comprehensive range of diseases caused by viruses, bacteria, fungi and other organisms are discussed in detail, making this book essential reading for forest managers and extension specialists. Written by recognized authorities in the subject of forest health, this book also provides a wealth of information useful for researchers and lecturers of forest pathology and ecology.
Author: Richard Barrie Smith
Author: Richard Barrie Smith
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Author: Richard Barrie Smith
Author: Barbara Ellen Kishchuk
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Author: Paolo Gonthier
Author: National Research Council Canada