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

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

ScholarsArchive@OSU

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

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

The story of fire on Deschutes National Forest

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

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

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

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

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

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

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

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