Index Catalog // ScholarsArchive@OSU

Management effects on nitrogen nutrition and long-term productivity of western hemlock stands : an exercise in simulation with FORCYTE

Creator:: Sachs, Donald
Abstract:: Regression equations applicable to biomass components of standsof western hemlock [Tsuga heterophylla (Raf.) Sarg.} were developedby destructive sampling of a thinned and an unthinned stand ofwestern hemlock near Seaside, Oregon. Equations predicted more live-branchbiomass and less dead-branch biomass per tree for the thinnedstand, but equations for biomass of foliage, twigs,...
Resource Type:: Masters Thesis

Survival and growth of Douglas-fir and ponderosa pine during eight years of whiteleaf manzanita and herb competition in southwest Oregon

Creator:: Funez, Atilio Ortiz
Abstract:: This thesis examines the 8-year growth trend of Douglas-fir (Pseudotsuga menziesii (mirb.)Franco), ponderosa pine (Pinus ponderosa Dougl. ex laws.), and whiteleaf manzanita (Arctostaphylos viscida Parry). Manzanita stands ranging from 1700/ha to 27000/ha density were grown among mixed conifers of the same age, which were planted in 1981 at 250x250 cm...
Resource Type:: Masters Thesis

Fertilization of 2-0 ponderosa pine seedlings in the nursery and field : morphology, physiology, and field performance

Creator:: Gleason, John F.
Abstract:: Two-year-old ponderosa pine (Pinus ponderosa Laws.) from two seed sources were grown at two nurseries. The Fremont seed source was raised at Bend and Stone Nursery; the Ochoco was grown at only the Bend Nursery. The seedlings were fertilized in late September-early October with nitrogen (N) or nitrogen plus potassium...
Resource Type:: Masters Thesis

The importance of maintenance respiration by living cells in the sapwood of subalpine conifers

Creator:: Ryan, Michael G.
Abstract:: Xylem conducting tissue or sapwood is an important storage organ for water, carbohydrates, and nutrients, and this storage helps trees accommodate environmental change. However, the living ray parenchyma cells in sapwood, which store the carbohydrates and nutrients, require energy for maintenance. I examined how sapwood maintenance costs vary among species,...
Resource Type:: Dissertation

The role of droplet size, concentration, spray volume, and canopy architecture in herbicide application efficiency

Creator:: Richardson, Brian
Abstract:: To improve the efficiency of herbicide applications, each stage of the spray application process must be considered. Two of these stages, the process of spray deposition within plant canopies and the influence of the form of the spray deposit on efficacy were investigated. The effect of droplet size, spray volume,...
Resource Type:: Dissertation

Dynamics of size structures : simulation and experiments in seedling stands of Pseudotsuga menziesii and Fraxinus mandshurica

Creator:: Petersen, Terry D.
Abstract:: Computer simulations and experiments were used to determine the basis for skewness and inequality in size structures (frequency distributions of Individual plant sizes) prior to self-thinning mortality. In simulated stands, density-dependent neighborhood heterogeneity caused variability in the growth rate of individuals with the same size, and such variability caused skewness...
Resource Type:: Dissertation

Physiological control of fine root turnover in Douglas-fir

Creator:: Marshall, John D. (John David), 1956-
Abstract:: To determine whether shading increases drought-induced root mortality by changing the chemical composition of roots, I conducted an experiment in which high and low light treatments in combination with high and low soil moisture treatments were applied to seedlings of Douglas-fir (Pseudotsuqa menziesii Mirb. Franco). Because synthesis of suberin (a...
Resource Type:: Dissertation

The taxonomy of the genus Hysterangium (Basidiomycotina, Hysterangiaceae) with notes on its ecology

Creator:: Castellano, Michael Angelo
Abstract:: Hysterangium, a genus of hypogeous Basidiomycotina (false truffles) is commonly placed in the Hysterangiaceae and ascribed affinities to the Phallales. It is a large genus among hypogeous taxa and is commonly collected in large numbers in eastern and western North America, Australasia and Europe. Some Hysterangium species are dominant components...
Resource Type:: Dissertation

Physiology of drought stress in Pinus ponderosa (Dougl. ex Laws.) and the influence of low irradiance

Creator:: Vance, Nan C.
Resource Type:: Dissertation

Thinning and urea fertilization effects on emerging grand fir (Abies grandis) foliage and growth of western spruce budworm (Choristoneura occidentalis) larvae

Creator:: Savage, Thomas J.
Abstract:: The objective of this study was to determine how the balance of carbon to nitrogen in a grand fir ecosystem affects the chemistry of emerging grand fir foliage and the growth of western spruce budworm larvae. Forest plots in the grand fir zone of eastern Oregon were thinned, thinned and...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Management effects on nitrogen nutrition and long-term productivity of western hemlock stands : an exercise in simulation with FORCYTE

Survival and growth of Douglas-fir and ponderosa pine during eight years of whiteleaf manzanita and herb competition in southwest Oregon

Fertilization of 2-0 ponderosa pine seedlings in the nursery and field : morphology, physiology, and field performance

The importance of maintenance respiration by living cells in the sapwood of subalpine conifers

The role of droplet size, concentration, spray volume, and canopy architecture in herbicide application efficiency

Dynamics of size structures : simulation and experiments in seedling stands of Pseudotsuga menziesii and Fraxinus mandshurica

Physiological control of fine root turnover in Douglas-fir

The taxonomy of the genus Hysterangium (Basidiomycotina, Hysterangiaceae) with notes on its ecology

Physiology of drought stress in Pinus ponderosa (Dougl. ex Laws.) and the influence of low irradiance

Thinning and urea fertilization effects on emerging grand fir (Abies grandis) foliage and growth of western spruce budworm (Choristoneura occidentalis) larvae

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