Index Catalog // ScholarsArchive@OSU

Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades

Creator:: Velazquez-Martinez, Alejandro
Abstract:: The objectives of this research were to study: a) the effect of thinning and treatments consisting of pruning and multinutrient fertilization on aboveground biolnass increment, growth efficiency (GE), and foliar nutrients; b) the influence of topoedaphic variables (soil nutrients, slope, aspect, and rock content) and foliar nutrients on both leaf...
Resource Type:: Dissertation

Fire history in three vegetation types on the eastern side of the Oregon Cascades

Creator:: Bork, Joyce L.
Abstract:: Historic fire return intervals in three different vegetation types dominated by ponderosa pine (Pinus ponderosa Laws.) were determined using fire scarred trees. Dendrochronological techniques were used to achieve accuracy in dating fire scars on samples collected from six 40 acre plots established in each site. Mean fire return intervals (MFRI)...
Resource Type:: Dissertation

Effects of prescribed fire and silvicultural activities on fuel mass and nitrogen redistribution in Pinus ponderosa ecosystems of central Oregon

Creator:: Shea, Ronald W.
Resource Type:: Masters Thesis

Debris flows and flood disturbance in small, mountain watersheds

Creator:: Snyder, Kai U.
Abstract:: This study examined debris flows occurring in a 125 km² study area in the Blue River watershed in the western Cascade Mountains of Oregon over a 50-year period. Debris flow occurrence was found to be concentrated in a distinct zone of high activity occupying approximately half of the study area,...
Resource Type:: Masters Thesis
Full Text:: River watershed in the western Cascade Mountains of Oregon over a 50-year period. Debris flow

The spatial distribution of wood-nesting ants in the central Coast Range of Oregon

Creator:: Nielsen, Gary R. (Gary Richard), 1956-
Resource Type:: Dissertation
Full Text:: Central Coast Range of Oregon AN ABSTRACT OF THE THESIS OF Gary R. Nielsen for the degree of Doctor of

Growth responses of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) to defoliation

Creator:: Osman, Khalid Amir
Abstract:: The effect of defoliation intensity and season on Douglas-fir growth were studied in three replications in the Siuslaw National Forest during 1988-1990. Four intensities of defoliation were applied once in either spring or summer 1988. Stem diameter and canopy area were linearly inversely proportional to the level of defoliation. Defoliation...
Resource Type:: Dissertation
Full Text:: submitted to Oregon State University in partial fulfillment of the requirements for the degree of Doctor

The influence of contemporary forest management on stream nutrient concentrations in an industrialized forest in the Oregon Cascades

Creator:: Meininger, William Scott
Abstract:: The increased demand for wood and fiber from a continually shrinking land base has resulted in the use of intensively managed forest plantations. The concentration of timber production on the most suitable sites allows the world's demand for forest products to be met on less land and enable native forests...
Resource Type:: Masters Thesis
Full Text:: Nutrient Concentrations in an Industrialized Forest in the Oregon Cascades Abstract approved

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Creator:: Schutter, Mary E.
Abstract:: The Oregon Long-Term Soil Quality Project was initiated to identify soil properties that respond rapidly to alternative management practices. Such practices included winter cover cropping, which was implemented at two experimental research stations and several grower fields throughout the Willamette Valley. The goal of this thesis was to identify the...
Resource Type:: Dissertation
Full Text:: approved: Richard P. Dick The Oregon Long-Term Soil Quality Project was initiated to identify soil

Distribution and prediction of Swiss needle cast of Douglas-fir in coastal Oregon

Creator:: Rosso, Pablo H.
Abstract:: This study was directed to improve our understanding of the ecology of Swiss needle cast (SNC) of Douglas-fir, a disease that produces extensive damage to forests and plantation in the coastal region of Oregon and Washington. A disease prediction model for the coastal area of Oregon was built by establishing...
Resource Type:: Dissertation
Full Text:: -fir in coastal Oregon AN ABSTRACT OF THE DISSERTATION OF Pablo H. Rosso for the degree of Doctor of

An edaphic study of the Mt. Pisgah Arboretum water garden, Coast Fork of the Willamette River

Creator:: Bergen, Cameron Francis
Abstract:: Wetlands are widely identified as providing important and fundamental processes valuable for maintaining ecosystem health and diversity. Located in the southern Willamette Valley, the Mt. Pisgah Arboretum contains some valuable remaining wetland habitat along the Coast Fork of the Willamette River. One goal of the Mt. Pisgah Arboretum is "to...
Resource Type:: Masters Thesis
Full Text:: A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the

ScholarsArchive@OSU

Interacting effects of stand density, site factors, and nutrients on productivity and productive efficiency of Douglas-fir plantations in the Oregon Cascades

Fire history in three vegetation types on the eastern side of the Oregon Cascades

Effects of prescribed fire and silvicultural activities on fuel mass and nitrogen redistribution in Pinus ponderosa ecosystems of central Oregon

Debris flows and flood disturbance in small, mountain watersheds

The spatial distribution of wood-nesting ants in the central Coast Range of Oregon

Growth responses of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) to defoliation

The influence of contemporary forest management on stream nutrient concentrations in an industrialized forest in the Oregon Cascades

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Distribution and prediction of Swiss needle cast of Douglas-fir in coastal Oregon

An edaphic study of the Mt. Pisgah Arboretum water garden, Coast Fork of the Willamette River

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