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Filtering by: Subject Douglas fir -- Reproduction Remove constraint Subject: Douglas fir -- Reproduction Contributor advisor sim Newton, Michael Remove constraint Contributor advisor sim: Newton, Michael Language English [eng] Remove constraint Language: English [eng]

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Effects of herbaceous weed control on young Douglas-fir moisture stress and growth

Creator:

Preest, David Stanley

Abstract:

Profitable, even-aged forest management depends on the early establishment and rapid growth of each new forest crop. These, in turn, require that the young trees have access to an adequate supply of native resources of moisture, nutrients and light. In Mediterranean-type climates, competition for soil moisture is the most serious...

Resource Type:

Dissertation
First-year response of Douglas-fir after release from snowbrush ceanothus

Creator:

Petersen, Terry D.

Abstract:

The release of Douglas-fir from competition with snowbrush (Ceanothus velutinus Dougl.) has often been suggested as a way to improve conifer yield in the western Cascades. This study investigated this possibility by describing changes in the availability of water and light and the response of Douglas-fir to the changing environment,...

Resource Type:

Masters Thesis
The influence of seral Coast Range vegetation on the growth habit of juvenile Douglas-fir

Creator:

Howard, Kerry Megan

Abstract:

A detailed analysis was performed on the juvenile growth of six types of Douglas-fir stock under the influence of typical seral Coast Range vegetation. Objectives were to analyze competitive influences important to the growth of tree seedlings and evaluate differences between stock type characteristics and growth patterns in response to...

Resource Type:

Masters Thesis
Interaction of seed source, competition and fertility on planted Douglas-fir (Pseudotstuga menziesii [Mirb.] Franco)

Creator:

Roth, Brian Edward

Abstract:

The main objective of this study was to evaluate the interaction between herbaceous competition, fertility, and seed source on Douglas-fir survival and growth. A secondary objective was to evaluate the effect of these various factors on the production of lammas shoots and the selectivity of deer browse. Finally, the role...

Resource Type:

Masters Thesis
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
Pre-harvest measures to reduce the weight of second-growth Douglas-fir

Creator:

Holt, Harvey Allen

Abstract:

The primary objective of this study is to explore the possibilities of two methods to reduce the weight of small commercial timber prior to logging. The two methods studied are injection of cacodylic acid and sour-felling. Treatments were applied in November, 1965 and May, 1966, with final harvest of the...

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 inter-relationship of salmonberry and Douglas-fir in cutover areas

Creator:

Allen, Hollis H.

Abstract:

The inter-relationship of salmonberry and Douglas-fir on cutover areas was investigated in the Coast Range of western Oregon. Animal influences affecting the survival of Douglas-fir in a salmonberry habitat were also investigated. The autecology of salmonberry was considered first by formulating a mathematical model to characterize the lateral encroachment of...

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
Internal moisture relations of standing Douglas-fir trees injected with organic arsenicals

Creator:

Holt, Harvey Allen

Abstract:

Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) ranging from 9.6 to 14.3 inches diameter breast height were treated with the organic arsenicals, monosodium methanearsonate (MSMA) and cacodylic acid. Treatments were applied at monthly intervals from February, 1967 to October, 1968, to ten to 25 trees each month. Treated trees were sampled in...

Resource Type:

Dissertation

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Academic Affiliation

Forest Science11
Forest Management5

Advisor

Newton, Michael16
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

Tappeiner, John2
Appleby, Arnold1
Appleby, Arnold P.1
Bailey, John D.1
Becker, B. William1
more Committee Members »

Creator

Holt, Harvey Allen2
Allen, Hollis H.1
Brandeis, Thomas James1
Cobb, Jimmie Osborn1
Cole, Elizabeth C.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1967 to 2008

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Decade

2000-20092
1990-19993
1980-19894
1970-19794
1960-19693

Degree Field

Forest Science9
Forest Management5
Forest Ecology1
Forest Products1

Degree Level

Master's12
Doctoral4

Degree Name

Master of Science (M.S.)12
Doctor of Philosophy (Ph.D.)4

Language

English [eng][remove]16

License

All rights reserved2

Non-Academic Affiliation

Oregon State University. Graduate School16

Peer Reviewed

No12

Resource Type

Masters Thesis12
Dissertation4

Rights Statement

Copyright Not Evaluated14
In Copyright2

Subject

Douglas fir7
Douglas fir -- Oregon -- Growth2
Plant competition2
Arctostaphylos -- Growth1
Douglas fir -- Fertilizers1
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