Index Catalog // ScholarsArchive@OSU

The phytotoxic effects of herbicide and adjuvant application by physiological timing on the woody shrub salal (Gaultheria shallon)

Creator:: Downs, Theodore
Abstract:: Salal is plant species that is native to forestland throughout the PNW and northern California that has been identified as a competitor to early crop tree development. This study consisted of a field and a radioisotope laboratory study to test four commonly used herbicides on salal (imazapyr, triclopyr, glyphosate, and...
Resource Type:: Masters Thesis
Full Text:: : John Tappeiner Salal is plant species that is native to forestland throughout the PNW and northern

Effects of stand density reduction on structural development in western Oregon Douglas-fir forests : a reconstruction study

Creator:: Bailey, John Duff, 1961-
Abstract:: This research examined thinning effects on stand structure and species composition in 50- to 120-year-old Douglas-fir forests. Thirty-two paired stands (thinned and unthinned) were measured throughout western Oregon, as were 20 old-growth stands for comparison. Thinnings occurred 10 to 24 years previously and ranged in intensity from 8 to 60%...
Resource Type:: Dissertation

The story of fire on Deschutes National Forest

Creator:: Eckert, Bradley E.
Resource Type:: Capstone Project

Temporal and spatial variability of historic fire frequency in the southern Willamette Valley foothills of Oregon

Creator:: Robbins, Danielle
Abstract:: A crossdated fire history was reconstructed for a 1562 km2 area in the southern Willamette foothills of Oregon, using fire scars and tree origin years from twelve sites. The purpose of this study was to determine fire frequency for each site and to quantify temporal and spatial variability of fire...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: ________________________ _ John C. Tappeiner II A crossdated fire history was

Evaluating nitrogen fertilization and cycling in Pacific Northwest Douglas-fir plantations: a literature review

Creator:: Rasor, Christopher T.
Abstract:: There are many diagnostic approaches to evaluate the nutritional status of a forest stand. "Inference based on site and stand characteristics, visual symptoms, and foliar analysis are suggested to have the greatest utility in routine evaluations, while soil analysis and pot trial techniques should primarily be regarded as research tools...
Resource Type:: Capstone Project

The clonal development of vine maple during Douglas-fir stand development in the Coast Range of Oregon

Creator:: O'Dea, Mary E.
Abstract:: Natural Douglas-fir stand development is the result of many types of disturbance, both natural and management induced. The magnitude and timing of these disturbances have profound effects on the structure and composition of both the overstory and understory plant communities. Vine maple responds to disturbance by basal sprouting, layering, producing...
Resource Type:: Masters Thesis

The effects of partial cutting on stand structure and growth, and forest plant communities of western hemlock-Sitka spruce stands in southeast Alaska

Creator:: Deal, Robert L.
Abstract:: This study evaluated the effects of partial cutting on stand structure and growth, patterns of conifer regeneration, stand mortality and disease, and understory plant diversity and abundance. Seventy-three 1/5 ha plots were established in 18 partially cut stands throughout southeast Alaska. These stands were partially cut 12 to 96 years...
Resource Type:: Dissertation

Branch diameter and wood density of young western hemlock (Tsuga heterophylla (Raf.) Sarg.) grown at several spacings

Creator:: DeBell, Jeffrey D.
Resource Type:: Masters Thesis

Structure and development of old-growth Douglas-fir in central western Oregon

Creator:: Poage, Nathan Jeremy
Abstract:: The tree species and size structure of 9l old-growth forests dominated by Douglas-fir in central western Oregon was characterized using complete inventories of all trees larger than 20cm dbh over a mean area of 17.1ha at each site. Douglas-fir accounted for over 75% of the total average basal area (39.1...
Resource Type:: Dissertation

The development of leaf area and biomass in the whiteleaf manzanita (Arctostaphylos viscida Parry.) brushfields of southwest Oregon

Creator:: Latt, Christopher R.
Abstract:: Arctostanhylos viscida is a broad-leaved, evergreen, sclerophylbus shrub which grows in northern California and the Siskiyou Mountain region of southwest Oregon. After site disturbance, A. viscida competes with conifer regeneration, and may dominate a site for ninety years. This study examined the rate at which full site occupancy occurs in...
Resource Type:: Masters Thesis

Douglas-fir, grand fir and plant community regeneration in three silvicultural systems in western Oregon

Creator:: Ketchum, J. Scott
Abstract:: Douglas-fir and grand fir seedling establishment and plant community regeneration were examined in a western Oregon forest following harvest in three different silvicultural systems: clearcut, two-story and patchcut. The two-story system consisted of removing all but 10 to 12 trees per acre. The patchcut system consisted of harvesting 1/2 acre...
Resource Type:: Masters Thesis

Germination and first-year survival of red alder seedlings in the central Coast Range of Oregon

Creator:: Haeussler, Sybille
Abstract:: The role of disturbance in seed germination and first-year survival of red alder (Alnus rubra) was studied over two growing seasons at four sites representing a climatic gradient within the central Coast Range of Oregon. Disturbance affected red alder seed germination and seedling establishment by altering the temperature and moisture...
Resource Type:: Masters Thesis

Stand development and individual tree morphology and physiology of young Douglas-fir (pleudotsuga menziesii) in association with tanoak (Lithocarpus densiflorus)

Creator:: Harrington, Timothy B. (Timothy Brian)
Abstract:: Effects of tanoak (Lithocarpus densiflorus) on early growth, morphology, and physiology of Douglas-fir (Pseudotsuga menziesii) were studied to determine developmental characteristics of young stands and mechanisms of competition. Growth, leaf area, and biomass of Douglas-fir, tanoak, and shrubs / herbs were monitored for six years after establishing a gradient of...
Resource Type:: Dissertation

Comparing structure and development of Douglas-fir old-growth, plantations, and young natural forests in western Oregon

Creator:: Dowling, Christopher D.
Abstract:: Ages, diameter growth, density, tree size, and species were studied in old-growth, plantation, and young natural Douglas-fir stands in three areas in western Oregon: the western and eastern Coast Range and the western Cascades. The purpose was to compare the development of these three stand types and to determine whether...
Resource Type:: Masters Thesis

Volatile oil from western juniper

Creator:: Kurth, E. F. (Ervin Frank), Ross, John Daryl, and Oregon Forest Products Laboratory
Resource Type:: Technical Report
Full Text:: . Ross Report No C-3 April 1954 OREGON FOREST PRODUCTS LABORATORY State Board of Forestry and School

Regeneration of salal : seedling establishment and the effects of overstory stand density on clonal morphology and expansion

Creator:: Huffman, David W. (William), 1962-
Abstract:: Regeneration of salal (Gaultheria shallon Pursh.) in the Coast Range of western Oregon was examined over two growing seasons in a three part study consisting of seedling establishment, clone excavation, and population sampling experiments. The effects of study site location, overstory stand density, and substrate on seedling emergence and survival...
Resource Type:: Masters Thesis

Clonal expansion and seedling recruitment of Oregon grape (Berberis nervosa) in Douglas-fir (Pseudotsuga menziesii) forests: comparisons with salal (Gaultheria shallon)

Creator:: Huffman, David W. (William), 1962- and Tappeiner, John C.
Abstract:: Seedling regeneration and morphology of Oregon grape (Berberis nervosa Pursh) and salal (Gaultheria shallon Pursh) were studied in thinned and unthinned Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the central Coast Range, Oregon. Above- and below-ground growth of both species were significantly and negatively correlated with stand density. Oregon grape...
Resource Type:: Article
Full Text:: shallon)1 David W. Huffman and John C. Tappeiner II Abstract: Seedling regeneration and morphology of

Long-term patterns of diameter and basal area growth of old-growth Douglas-fir trees in western Oregon

Creator:: Poage, Nathan Jeremy and Tappeiner, John C., II
Abstract:: Diameter growth and age data collected from stumps of 505 recently cut old-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees at 28 sample locations in western Oregon (U.S.A.) indicated that rapid early and sustained growth of old Douglas-fir trees were extremely important in terms of attaining large diameters at ages 100–300...
Resource Type:: Article
Full Text:: Douglas-fir trees in western Oregon Nathan J. Poage and John C. Tappeiner, II Abstract: Diameter growth

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:: . Signature redacted for privacy. ?JQ C> ···~ ✓ John C. Tappeiner II Without the natural occurrence of

Wood quality studies in second-growth western redcedar (Thuja plicata Donn.)

Creator:: DeBell, Jeffrey D.
Abstract:: Western redcedar (Thuja plicata Donn.) is a valuable commercial species found in the northwestern United States and southwestern Canada. This dissertation includes four papers focused on wood and stem characteristics of second-growth western redcedar, and how those characteristics vary within the stem or how they are influenced by cultural practices....
Resource Type:: Dissertation

Search Constraints

Search Results

Limit your search