Index Catalog // ScholarsArchive@OSU

Detection of 2,4-D herbicide damage using ground-based measurements : implications for remote sensing

Creator:: McCreight, Richard W.
Abstract:: Spectral patterns of three brush species under the influence of herbicide treatment were investigated to evaluate the effectiveness of monitoring forest vegetation management using ground-based and remote sensing techniques. Foliage of Pacific rhododendron (Rhododendron macrophyllum D. Don), golden chinkapin (Castanopsis chrysophylla Dougl.), and hairy manzanita (Arctostaphylos columbiana Piper) sprayed with...
Resource Type:: Masters Thesis

Effect of solution nitrogen and phosphorus on growth, carbon allocation and nitrogen fixation of red alder seedlings

Creator:: Lipp, Cynthia C.
Abstract:: The effect of solution nitrogen (N) and phosphorus (P) concentrations on biomass production and N₂ fixation of red alder (Alnus rubra Bong.) seedlings grown in perlite-filled pots in a climate controlled growth room were studied. Nodulated seedlings were subjected to 12 different nutrient solution combinations of nitrogen and phosphorus and...
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

Time-based nitrogen availability and risk of Taeniatherum caput-medusae (L.) Nevski invasion in central Oregon

Creator:: Stubbs, Michelle M.
Abstract:: During the last century, fire suppression, grazing, and climate change have caused sagebrush grasslands to be altered in both function and form; juniper and sagebrush dominate the landscape at the expense of herbaceous plants. Management efforts to reduce juniper and sagebrush overstory in order to enhance herbaceous components of the...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Science presented on June 30, 2000. Title: Time-based Nitrogen

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

Survival and some physiological aspects of tissue cultured cells from Douglas-fir (Pseudotsuga menziesii Mirb. (Franco)) and a poplar hybrid after freezing to liquid nitrogen temperature

Creator:: Binder, Wolfgang Dieter
Abstract:: Cell aggregate size in both Douglas-fir and poplar suspension cultures was reduced by the addition of the chelator compounds EDTA and CDTA at concentrations under 100 ppm. Reduced cell aggregate size increased growth efficiency of suspension cultures of both species. Cell aggregates 550 j.z. or smaller in size were used...
Resource Type:: Dissertation

The effects of water and shade treatments on photosynthesis and root-rhizosphere respiration in young ponderosa pine

Creator:: Johnson, Theresa J.
Abstract:: Water treatments were applied to young ponderosa pine trees in the Eastern Cascades, Oregon during the 2003 growing season, and shade treatments were applied during the 2003 and 2004 growing seasons to understand how photosynthesis and soil respiration, particularly the root/rhizosphere fraction (R[subscript rrh]), would respond to increased moisture availability...
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

The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

Creator:: Waddell, Karen L.
Abstract:: Foliage from Douglas-fir(var. glauca) seedlings grown under two light intensities was bioassayed to examine palatability to the western spruce budworm (Choristoneura occidentalis Free.). Samples were collected in Fall, Winter and early Spring to identify seasonal changes in host foliage, as evidenced by the response of spruce budworms. Fall collected foliage...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Detection of 2,4-D herbicide damage using ground-based measurements : implications for remote sensing

Effect of solution nitrogen and phosphorus on growth, carbon allocation and nitrogen fixation of red alder seedlings

Conifer phytotoxicity and vegetation control efficacy of ten selected herbicides

Time-based nitrogen availability and risk of Taeniatherum caput-medusae (L.) Nevski invasion in central Oregon

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

Survival and some physiological aspects of tissue cultured cells from Douglas-fir (Pseudotsuga menziesii Mirb. (Franco)) and a poplar hybrid after freezing to liquid nitrogen temperature

The effects of water and shade treatments on photosynthesis and root-rhizosphere respiration in young ponderosa pine

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

The effect of light intensity on Douglas-fir foliage quality : survival and development of Western spruce budworm

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