Index Catalog // ScholarsArchive@OSU

Influence of Bravo fungicide applications on wood density and moisture content of Swiss needle cast affected Douglas-fir trees

Creator:: Johnson, G. R., Gartner, Barbara L., Maguire, Doug, and Kanaskied, Alan
Abstract:: Wood density, moisture content, tracheid width and cell wall size were examined in trees from plots that were sprayed for 5 years with chlorothalonil (Bravo®) fungicide to reduce the impact of Swiss needle cast (SNC) and from trees in adjacent unsprayed plots. The unsprayed (more heavily diseased) trees had significantly...
Resource Type:: Article
Full Text:: ' , Barbara L. Gartner b, Doug Maguire c, Alan'~)Kanaskie d aUSDA Forest Service, 3200 SW Jefferson Way

Database development and application to characterize juvenile Douglas-fir (Pseudotsuga menziesii [Mirb] and understory vegetation in the Oregon and Washington Coast Range Mountains

Creator:: Shula, Robert G.
Abstract:: The Regional Vegetation Management Model (RVMM) predicts the effects of associated vegetation on the growth and yield of young Douglas-fir (age [less than or equal to] 20 years) in the Pacific Northwest, and is a 'front-end' growth model for existing rotation-age growth models. Objectives of this thesis are to: (a)...
Resource Type:: Masters Thesis

Snag longevity, bird use of cavities, and conifer response across three silvicultural treatments in the Oregon Coast Range

Creator:: Walter, Scott T.
Abstract:: In the interest of meeting multiple forest management goals that include maintenance of wildlife, particularly cavity-nesting birds, uneven-aged silvicultural treatments are used increasingly in the Pacific Northwest. However, questions remain regarding the responses of cavity-nesting birds and residual green trees to different harvest intensities and patterns. To study these issues,...
Resource Type:: Masters Thesis
Full Text:: experience. I also thank Doug Maguire, Richard Schmitz, and John Tappeiner for advice and help throughout

Development of a hybrid modeling framework for intensively managed Douglas-fir plantations in the Pacific Northwest

Creator:: Weiskittel, Aaron R.
Abstract:: Forest growth models in the Pacific Northwest are predominantly empirical. Predictions of yield under alternative silvicultural regimes cannot rely completely on field trials; yet empirical growth models are often inadequate for extrapolating untested regimes and genotypes. The limitations of current models include (1) long time-steps (e.g. 5-10 years); (2) insufficient...
Resource Type:: Dissertation
Full Text:: , composed of Drs. Doug Maguire (major advisor), Robert A. Monserud, Temesgen Hailemariam, Randy Johnson

Seedling response to vegetation management in northeastern Oregon

Creator:: Lindsay, Amanda A.
Abstract:: Northeastern Oregon geology and climate provides moderately productive conditions for forest management and timber production. Although site preparation and planting are commonly used silvicultural practices, little research exists on the efficacy of specific forest herbicides and responses of seedling survival and growth in this region. This research seeks to improve...
Resource Type:: Masters Thesis
Full Text:: ACKNOWLEDGEMENTS The author expresses sincere appreciation to Mike Newton and Doug Maguire for being my co

The role and function of fruit trees and fruit tree-based agroforestry systems in a highland watershed in northern Thailand

Creator:: Withrow-Robinson, Bradford A.
Abstract:: Field studies were conducted from 1996 to 1998 in three villages in a Highland watershed in Mae Hong Son Province, northern Thailand. The objectives of the study were to classify and define the fruit-based agroforestry cropping system and investigate management activities used by villagers. In the first part of the...
Resource Type:: Dissertation

Effects of weed control on vegetation dynamics in Pacific Northwest conifer plantations

Creator:: Chen, Fen-Hui
Abstract:: Weed control in Pacific Northwest forests has been criticized for its potential impact on biodiversity. Changes were evaluated in conifer growth, diversity of vegetation in situ and of recruiting plants through different regeneration mechanisms after applying temporally-varied weed control by herbicide treatments based on the critical period concept. Conifer size...
Resource Type:: Dissertation

Morphological characteristics of ponderosa pine and lodgepole pine regeneration nine years after stand density reduction at three sites in central Oregon

Creator:: Michel, Alexa K.
Abstract:: Without the natural occurrence of fire in ponderosa pine forests of the western US, lodgepole pine has started to dominate regeneration in many forest stands and may be gradually replacing ponderosa pine over time. This development, however, conflicts with recent efforts in this region to restore old-aged, open ponderosa pine...
Resource Type:: Masters Thesis
Full Text:: the completion of this thesis. First of all, I would like to acknowledge my major professors Doug

Effect of site and silvicultural treatment on insect pests and diseases of young ponderosa pine

Creator:: Norlander, Daniel W. D.
Abstract:: Ponderosa pine is an important species both commercially and ecologically in western North America. This study considers the incidence of insect and disease pests on a series of replicated ponderosa pine research plantations in northern California. The studies, on an environmental gradient, contain a series of silvicultural treatments including vegetation...
Resource Type:: Masters Thesis
Full Text:: work in his lab. Doug Maguire for his advice and help with the statistics. And Paul Adams for

Evaluating the effectiveness of commonly used herbaceous weed control regimes in a Pacific Northwest conifer plantation

Creator:: Dinger, Eric
Abstract:: Early in the establishment of Pacific Northwest conifer plantations, herbaceous weeds often decrease seedling growth through competition for soil moisture during the dry summer months. Critical period studies have reported that reductions in competitive weed cover are necessary during the initial years of establishment to avoid reductions in seedling growth....
Resource Type:: Masters Thesis
Full Text:: Rose, Doug Maguire, Carol Mallory-Smith, and Jeff Stone provided a high standard of excellence, a

ScholarsArchive@OSU

Influence of Bravo fungicide applications on wood density and moisture content of Swiss needle cast affected Douglas-fir trees

Database development and application to characterize juvenile Douglas-fir (Pseudotsuga menziesii [Mirb] and understory vegetation in the Oregon and Washington Coast Range Mountains

Snag longevity, bird use of cavities, and conifer response across three silvicultural treatments in the Oregon Coast Range

Development of a hybrid modeling framework for intensively managed Douglas-fir plantations in the Pacific Northwest

Seedling response to vegetation management in northeastern Oregon

The role and function of fruit trees and fruit tree-based agroforestry systems in a highland watershed in northern Thailand

Effects of weed control on vegetation dynamics in Pacific Northwest conifer plantations

Morphological characteristics of ponderosa pine and lodgepole pine regeneration nine years after stand density reduction at three sites in central Oregon

Effect of site and silvicultural treatment on insect pests and diseases of young ponderosa pine

Evaluating the effectiveness of commonly used herbaceous weed control regimes in a Pacific Northwest conifer plantation

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