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Drivers of Productivity Differences between Native and Exotic Range Douglas-fir Plantations in Oregon and New Zealand

Creator:: Gilson, Liam W.
Abstract:: In this thesis, we first examine the principle hypotheses behind the improved exotic growth of select timber species, and the evidence for each, with special focus on studies which examine growth between several ranges of a species. We find that literature suggests environmental factors directly tied to net primary production...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Douglas A. Maguire In this thesis, we first examine the principle hypotheses behind the

Assessing Mechanisms of Douglas-fir Growth Response to Operational Nitrogen Fertilization in Western Oregon

Creator:: Putney, Jacob D.
Abstract:: Nitrogen (N) fertilizer is a commonly applied silvicultural treatment in intensively managed Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] plantations. When attempting to maximize average growth responses through fertilization, landowners experience difficulty prioritizing stands for treatment based on the likely magnitude of response and return on the operational investment. Field trials were...
Resource Type:: Masters Thesis
Full Text:: Douglas A. Maguire Nitrogen (N) fertilizer is a commonly applied silvicultural treatment in

Impact of Climate and Disturbance on the Formation of Earlywood and Latewood in Douglas-fir at the Salal Fields Study Site

Creator:: Gourley, Derek M. F.
Abstract:: Wood density is controlled to a large extent by the relative widths of earlywood and latewood in the stem, but the mechanisms controlling these amounts are poorly understood in coastal Douglas-fir. To understand the role of climatic factors, one hundred and thirty-six increment cores were collected and measured from the...
Resource Type:: Masters Thesis
Full Text:: approved: ______________________________________________________ Douglas A. Maguire Wood

Douglas-fir (Psuedotsuga menziesii) biomass and nutrient removal under varying harvest scenarios involving co-production of timber and feedstock for liquid biofuels

Creator:: Coons, Kristin L.
Abstract:: In this study an improved model of biomass and nutrient estimation of coastal Douglas-fir (Psuedotsuga menziesii) in the Pacific Northwest has been developed across a wide range of stand management regimes. This study quantifies and defines the type and intensity of biomass harvest and associated removal for actively managed stands...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ Douglas A. Maguire In this study an improved model of biomass and nutrient estimation of

Estimation of leaf area index and simulation of evapotranspiration for intensively managed Douglas-fir forests

Creator:: Rogers, Nicole S.
Abstract:: Understanding the tradeoff between water use and productivity is critical for modeling growth of intensively managed Douglas-fir forests in the Pacific Northwest. Evapotranspiration is closely linked to carbon dioxide intake during the process of photosynthesis. However, summer drought characterizing the growing season in this region imposes a limit on carbon...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________________ Douglas A. Maguire Understanding the tradeoff between water use and productivity is

A biological classification and characterization of structure in managed, mixed-species, multi-aged stands

Creator:: Singleton, Ryan B.
Abstract:: Forest management requires classification of forest stands into groupings or types based on structural similarities, even when structure varies continuously along gradients. Managed, mixed-species, multi-aged forest stands often display complex structures containing extreme variation in trees size, density, and species composition, and as a result have diverse canopy structures. A...
Resource Type:: Masters Thesis

Twenty-five-year response of Larix occidentalis stem form to five stand density regimes in the Blue Mountains of eastern Oregon

Creator:: Lennette, Andrew P.
Abstract:: Upper-stem diameter measurements from a levels-of-growing-stock study on Larix occidentalis in the Blue Mountains of eastern Oregon were collected over a 25 year period with an optical dendrometer. The following hypotheses were tested with these data: 1) stand density regime has a significant effect on stem form; and 2) crown...
Resource Type:: Masters Thesis

Alterations in Douglas-fir crown structure, morphology, and dynamics imposed by the Swiss needle cast disease in the Oregon Coast Range

Creator:: Weiskittel, Aaron R.
Abstract:: Plants respond to defoliation in many different and complex ways, depending on their growth habit and form as well as the extent and duration of the defoliation. Tree crowns have been shown to be quite sensitive to disturbances such as defoliation, however quantitative relationships have rarely been developed, making the...
Resource Type:: Masters Thesis
Full Text:: Oregon Coast Range Abstract approved Douglas A. Maguire Plants respond to defoliation in many

Growth analysis of heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Creator:: Mainwaring, Douglas B.
Abstract:: Basal area and height growth were analyzed for individual trees in uneven-aged ponderosa and lodgepole pine stands in central Oregon. Basal area growth was modeled as a function of other stand and tree variables to address five general objectives: 1) to compare the predictive ability of distance-dependent versus distance-independent stand...
Resource Type:: Masters Thesis
Full Text:: approved: _______________________ _ Douglas A. Maguire Basal area and height growth were analyzed for

Crown structure, stand dynamics, and production ecology of two species mixtures in the central Oregon Cascades

Creator:: Garber, Sean M.
Abstract:: Knowledge of stand structure, stand dynamics, and production ecology of species mixtures lags well behind that of single-species, even-aged stands. Two mixed-species spacing trials in central Oregon allowed investigation of mixed-species dynamics in a controlled experimental setting. The first site, Pringle Butte, is a mixture of ponderosa pine (Pinus ponderosa...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved ___________________ _ Douglas A. Maguire Knowledge of stand structure, stand dynamics

ScholarsArchive@OSU

Drivers of Productivity Differences between Native and Exotic Range Douglas-fir Plantations in Oregon and New Zealand

Assessing Mechanisms of Douglas-fir Growth Response to Operational Nitrogen Fertilization in Western Oregon

Impact of Climate and Disturbance on the Formation of Earlywood and Latewood in Douglas-fir at the Salal Fields Study Site

Douglas-fir (Psuedotsuga menziesii) biomass and nutrient removal under varying harvest scenarios involving co-production of timber and feedstock for liquid biofuels

Estimation of leaf area index and simulation of evapotranspiration for intensively managed Douglas-fir forests

A biological classification and characterization of structure in managed, mixed-species, multi-aged stands

Twenty-five-year response of Larix occidentalis stem form to five stand density regimes in the Blue Mountains of eastern Oregon

Alterations in Douglas-fir crown structure, morphology, and dynamics imposed by the Swiss needle cast disease in the Oregon Coast Range

Growth analysis of heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Crown structure, stand dynamics, and production ecology of two species mixtures in the central Oregon Cascades

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