Index Catalog // ScholarsArchive@OSU

Meta-sedimentary bedrock as an alternative source of water for forest ecosystems in a Mediterranean climate

Creator:: Zwieniecki, Maciej A.
Abstract:: Evaluation of meta-sedimentary bedrock as a source of stored water available to plants in a mediterranean climate is presented based on: root length distribution (RLD), root morphology, rock water holding capacity and seasonal pattern of water depletion. Studies were performed in southwestern Oregon under young stands of whiteleaf manzanita, ponderosa...
Resource Type:: Dissertation

Efficiency of forest vegetation control with herbicides

Creator:: Fredrickson, Edward A.
Abstract:: Selective suppression of crown and root sprouting of non-coniferous cover are the keys to effective forest vegetation management. This study 1) develops insight into mechanisms of controlling root suckering and top regrowth of bear clover (Chamaebatia foliolosa), and develops a broad data base for controlling broad groups of vegetation chemically....
Resource Type:: Masters Thesis

Summer soil moisture dynamics in a young Douglas-fir plantation as influenced by three herbaceous weed communities

Creator:: Preest, David Stanley
Abstract:: The use of chemicals such as the triazines (especially atrazine) and mixtures of the triazines and 2,4-D or 2,4,5-T has become almost standard practice in some parts of the world for selectively controlling grasses and other herbaceous weeds to conserve moisture for and/or prevent the smothering of newly-planted conifers. In...
Resource Type:: Masters Thesis

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:: THESIS OF Amanda A. Lindsay for the degree of Master of Science in Forest Science presented on

The differential response of Fraxinus pennsylvanica, Liquidambar styraciflua, and Acer saccharinum to picloram as measured by CO₂ absorption and evolution

Creator:: Webb, Warren Lewis, 1935-
Abstract:: The tolerance of woody plants to picloram (4amino-3,5,6-trichloropicolinic acid) has been shown by field applications to vary from mild to extreme. A laboratory study was done to investigate the basic causes for this range of tolerance known to exist among three woody plant species, Fraxinus pennsylvanics, March, (green ash) resistant,...
Resource Type:: Masters Thesis

The life history of vine maple on the H. J. Andrews Experimental Forest

Creator:: Russel, David Wright
Abstract:: The objective of this study was to examine the life history of vine maple on the H. J. Andrews Experimental Forest. This study was conducted as a part of an I. B. P. general study of understory biomass and productivity. The specific objectives were to 1) estimate the contribution of...
Resource Type:: Masters Thesis

Some strategies for controlling the Douglas-fir tussock moth by regulation of budbreak

Creator:: Cobb, Jimmie Osborn
Abstract:: The young larvae of the Douglas-fir tussock moth (Orgyia pseudotsugata (McDunnough) (DFTM) are dependent on the new foliage of its ho'sts (Doug1as-fir, grand fir, white fir) for their food supply. The phenology of the DFTM and its hosts are synchronized, with egg hatch and dispersal occurring one to three weeks...
Resource Type:: Masters Thesis

The influence of dormant brush sprays on forest succession in Western Oregon

Creator:: O'Dell, Tharon Earl
Abstract:: This study was designed to learn the effect a specific herbicide practice on plant communities. Data were obtained from brushfields that had been aerially sprayed with 2,4-D (2,4 dichiorophenoxyacetic acid) and/or 2,4,5-T (2,4,5 trichlorophenoxyacetic acid). Qualitative data on species composition, cover percent, height, response to herbicide and site description were...
Resource Type:: Masters Thesis

The role of droplet size, concentration, spray volume, and canopy architecture in herbicide application efficiency

Creator:: Richardson, Brian
Abstract:: To improve the efficiency of herbicide applications, each stage of the spray application process must be considered. Two of these stages, the process of spray deposition within plant canopies and the influence of the form of the spray deposit on efficacy were investigated. The effect of droplet size, spray volume,...
Resource Type:: Dissertation

The metabolic pathways and physiological effects of atrazine in Douglas-fir seedlings

Creator:: Peterson, Charles Adrian
Abstract:: Herbicides are being used as a tool by forest managers to speed the restocking of sites where tree seedlings face competition from grasses for limited moisture, light and nutrients. Retarded growth or, more commonly, death of the seedlings would occur if a selective herbicide was not used to control competing...
Resource Type:: Dissertation

ScholarsArchive@OSU

Meta-sedimentary bedrock as an alternative source of water for forest ecosystems in a Mediterranean climate

Efficiency of forest vegetation control with herbicides

Summer soil moisture dynamics in a young Douglas-fir plantation as influenced by three herbaceous weed communities

Seedling response to vegetation management in northeastern Oregon

The differential response of Fraxinus pennsylvanica, Liquidambar styraciflua, and Acer saccharinum to picloram as measured by CO₂ absorption and evolution

The life history of vine maple on the H. J. Andrews Experimental Forest

Some strategies for controlling the Douglas-fir tussock moth by regulation of budbreak

The influence of dormant brush sprays on forest succession in Western Oregon

The role of droplet size, concentration, spray volume, and canopy architecture in herbicide application efficiency

The metabolic pathways and physiological effects of atrazine in Douglas-fir seedlings

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