Index Catalog // ScholarsArchive@OSU

Mechanical behavior of coniferous trees subjected to wind loading

Creator:: Moore, John R.
Abstract:: The behavior of coniferous trees subjected to wind loading was investigated through a series of experiments and also through simulation modeling. Previous studies that measured the natural oscillation frequencies and damping ratios were reviewed and equations were developed for predicting the natural frequency of a tree from the ratio of...
Resource Type:: Dissertation

Wind direction and effect of tree lean on coarse woody debris production

Creator:: Bustos-Letelier, Oscar
Abstract:: The natural fall of trees in riparian areas is an important source of coarse woody debris for mountain streams, improving fish habitat and influencing stream morphology. Existing models consider the probability of coarse woody debris entering a stream channel based upon trees having a random direction of fall without consideration...
Resource Type:: Masters Thesis

Design of an apparatus with controlled rates of temperature change for use in cold tolerance tests of conifers

Creator:: Wessell, William James
Abstract:: An apparatus was designed to permit freezing tests of needles and other tissue parts from coniferous trees under controlled rates of temperature change with time. The design is based on the principle of a balanced system of refrigeration demand and heat input to achieve a steady temperature state. The apparatus...
Resource Type:: Masters Thesis

Conifer phytotoxicity and vegetation control efficacy of ten selected herbicides

Creator:: Coate, Jeremy E.
Abstract:: Ten herbicides (atrazine, azafenidin, chlorsulfuron, clopyralid, hexazinone, imazapic, imazapyr, metsulfuron, pendimethalin, and sulfometuron) were evaluated for phytotoxicity in first-year seedlings of eight conifer species (Douglas-fir, grand fir, noble fir, redwood, Sitka spruce, western hemlock, western red cedar, and western white pine). Six of these herbicides (atrazine, clopyralid, hexazinone, imazapyr, metsulfuron,...
Resource Type:: Masters Thesis

Effects of shade on performance and chlorophyll fluorescence of four Pacific Northwest seedling conifer species

Creator:: Khan, Shafiqur Rehman
Abstract:: The influence of shading intensity on performance, chlorophyll fluorescence emissions, the slope of the fluorescence induction curve, chlorophyll contents, and stomatal conductance of four Pacific Northwest conifer species [ponderosa pine (Pinus ponderosa Laws.), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), western redcedar (Thujaplicata Donn.), and western hemlock (Tsuga heterophylla (Raf.) Sarg.)] was...
Resource Type:: Dissertation

Relationships of tree growth to nitrogen and water availability in a sheep-tree-pasture system in Douglas County, Oregon : field case study and shadehouse simulation

Creator:: DeMeo, Thomas
Abstract:: This thesis consists of three parts: 1) a field case study involving tree growth, moisture stress, and foliar nitrogen response to sheep-grazed pasture treatments; 2) a shadehouse (potted-plant) study of simulated grazing effects on tree growth and moisture use; and 3) a summary, synthesizing results of the field and shadehouse...
Resource Type:: Masters Thesis

Development of a Collision Detection Module for Avian and Bat Species on Wind Turbine

Creator:: Davis, Cassandra L.
Abstract:: Renewable energy technology continues to grow in popularity as countries aim to reduce greenhouse gas emissions. Land based and offshore wind turbines are one option for expanding renewable energy sources. However, as wind energy adoption increases, so does the need for enhanced monitoring of wind turbines’ potential effect on local...
Resource Type:: Capstone Project
Full Text:: sweep away the carcasses [5]. Therefore, limiting the detrimental effect of wind turbines on wildlife

Evaluation of sulfur dioxide injury to vegetation on federal lands near the Anaconda copper smelter at Anaconda, Montana

Creator:: Carlson, Clinton E. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: believed that very high concentrations, of lead, cadmium, or zinc would have an adverse effect on

The relationship of an insect infestation on lodgepole pine to fluorides emitted from a nearby aluminum plant in Montana

Creator:: Carlson, Clinton E., Bousfield, Wayne E., McGregor, Mark D., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Stepwise multiple regression techniques were used to statistically analyze the relationships between damage caused by the pine needle sheath miner Zellaria haimbachi (Busck); a needle miner, Oenerostoma etrobivorum (Zeller); sugar pine tortrix, Choriatoneura Zambertiana (Busck); and ambient and foliar concentrations of fluoride in lodgepole pine (Pinue contorta v. Zatifolia Engelm.)...
Resource Type:: Technical Report
Full Text:: relationship were not studied but research on the effect of different foliar and/or ambient fluoride

Effects of weed control on vegetation dynamics in Pacific Northwest conifer plantations

Creator:: Chen, Fen-Hui
Abstract:: Weed control in Pacific Northwest forests has been criticized for its potential impact on biodiversity. Changes were evaluated in conifer growth, diversity of vegetation in situ and of recruiting plants through different regeneration mechanisms after applying temporally-varied weed control by herbicide treatments based on the critical period concept. Conifer size...
Resource Type:: Dissertation

ScholarsArchive@OSU

Mechanical behavior of coniferous trees subjected to wind loading

Wind direction and effect of tree lean on coarse woody debris production

Design of an apparatus with controlled rates of temperature change for use in cold tolerance tests of conifers

Conifer phytotoxicity and vegetation control efficacy of ten selected herbicides

Effects of shade on performance and chlorophyll fluorescence of four Pacific Northwest seedling conifer species

Relationships of tree growth to nitrogen and water availability in a sheep-tree-pasture system in Douglas County, Oregon : field case study and shadehouse simulation

Development of a Collision Detection Module for Avian and Bat Species on Wind Turbine

Evaluation of sulfur dioxide injury to vegetation on federal lands near the Anaconda copper smelter at Anaconda, Montana

The relationship of an insect infestation on lodgepole pine to fluorides emitted from a nearby aluminum plant in Montana

Effects of weed control on vegetation dynamics in Pacific Northwest conifer plantations

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