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Filtering by: Has journal iForest-Biogeosciences and Forestry Remove constraint Has journal: iForest-Biogeosciences and Forestry Advisor Newton, Michael Remove constraint Advisor: Newton, Michael

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Nutrient losses and nitrogen mineralization on forested watersheds in Oregon's Coast Range

Creator:

Miller, James H.

Abstract:

Nutrient losses of the biologically responsive anions, nitrate and bicarbonate together with the major cations, were monitored on 14 small watersheds in Oregon's Coast Range and evaluated in relation to management-induced disturbance. Mixed forests of Douglas-fir and red alder had dominated these high-nitrogen sites prior to treatment. A paired-watershed experimental...

Resource Type:

Dissertation
The influence of pre-harvest killing of western hemlock on subsequent stump invasion by Fomes annosus

Creator:

Laird, Peter Paul

Abstract:

This study concerns the effect of pre-harvest killing of commercial sized, forty year old western hemlock (Tsuga heterophylla (Raf.) Sarg.) on subsequent stump infection by Fomes annosus (Fr.) Karst. Further evaluations were made on tree drying, loosening of bark, wood deterioration and rate of crown and cambial death. Findings on...

Resource Type:

Dissertation
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 ecology and management of invasive plant species on tropical islands

Creator:

Hooper, Carolina

Abstract:

Tropical island ecosystems have proven to be inordinately vulnerable to invasions by exotic plants and animals. Today these islands only contain small remnant populations of the original flora and fauna, and these populations are facing increasing pressure from invasive plants. This paper attempts to answer four important questions whose solutions...

Resource Type:

Capstone Project
Underplanting and competition in thinned Douglas-fir

Creator:

Brandeis, Thomas James

Abstract:

Understory conifer regeneration needs to occur beneath conifer-dominated canopies if two-storied or uneven-aged structures are to be considered for western Oregon Coast Range stand management. To ensure adequate numbers of seedlings to meet stocking or habitat structure objectives, planting may be a solution. We undertook a multi-level study to determine...

Resource Type:

Dissertation
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
Early survival and growth response of five species of Pinus to plant competition and aspect in southwest Oregon and northeast Mexico

Creator:

Capo-Arteaga, Miguel A.

Abstract:

The effect of forest shrub vegetation on soil moisture, temperatures evaporation potentials and the survivals growth and bud activity of five species of Pinus was studied on planting sites placed on opposite exposures on two locations in southwest Oregon and northeast Mexico. Treatments applied were: Manual slashing; Manual slashing plus...

Resource Type:

Dissertation
Survival and growth of Douglas-fir and ponderosa pine during eight years of whiteleaf manzanita and herb competition in southwest Oregon

Creator:

Funez, Atilio Ortiz

Abstract:

This thesis examines the 8-year growth trend of Douglas-fir (Pseudotsuga menziesii (mirb.)Franco), ponderosa pine (Pinus ponderosa Dougl. ex laws.), and whiteleaf manzanita (Arctostaphylos viscida Parry). Manzanita stands ranging from 1700/ha to 27000/ha density were grown among mixed conifers of the same age, which were planted in 1981 at 250x250 cm...

Resource Type:

Masters Thesis
Comparative effects of chemical, fire, and machine site preparation in an Oregon coastal brushfield

Creator:

Kelpsas, Bruce Robert

Abstract:

Four brushfield reclamation methods were compared on a 28 hectare area supporting a dense overstory of red alder and a thick understory of deciduous brush species. Tractor scarification, aerial application of 2, 4, 5-T and picloram followed by broadcast burning or tractor crushing, and aerial application of glyphosate were performed...

Resource Type:

Masters Thesis
Fifth-year growth responses of Douglas-fir to crowding and other competition

Creator:

Cole, Elizabeth C.

Abstract:

This thesis examines the competitive aspects of Douglas-fir trees growing with two commonly associated competitors--red alder and grass--at varying densities. Two Nelder plots in three different environments in the Oregon Coast Range were studied. The sites represented the warm, dry climate of the Willamette Valley; the warm, moist climate of...

Resource Type:

Masters Thesis

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Academic Affiliation

Forest Science24
Forest Management16

Advisor

Newton, Michael[remove]40
Bailey, John D.1
Gartner, Barbara L.1
Maguire, Douglas A.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1967 to 2009

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Committee Member

Appleby, Arnold2
Appleby, Arnold P.2
Dilworth, John R.2
Overton, W. Scott2
Tappeiner, John2
more Committee Members »

Creator

Holt, Harvey Allen2
Preest, David Stanley2
Webb, Warren Lewis, 1935 2
Ahrens, Glenn R.1
Allen, Hollis H.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1966 to 2008

View distribution

Decade

2000-20094
1990-19999
1980-19898
1970-197914
1960-19695

Degree Field

Forest Science22
Forest Management16
Forest Ecology1
Forest Products1

Degree Level

Master's29
Doctoral11

Degree Name

Master of Science (M.S.)28
Doctor of Philosophy (Ph.D.)11
Master of Forestry (M.F.)1

File Format

application/pdf1

Language

English [eng]40

License

All rights reserved4

Non-Academic Affiliation

Oregon State University. Graduate School39

Peer Reviewed

No31

Resource Type

Masters Thesis28
Dissertation11
Capstone Project1

Rights Statement

Copyright Not Evaluated36
In Copyright4

Subject

Douglas fir7
Plant competition -- Oregon3
Douglas fir -- Oregon -- Growth2
Forest ecology2
Plant competition2
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