Concern over the increasing proportion of juvenile wood grown in second growth plantations has led to a large amount of research on the effects of common silvicultural practices on wood quality. Lacking is research on the effect of timing and
duration of vegetation control on wood quality near the pith...
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,...
The overall purpose of this study was to examine the root and shoot development of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings at two distinct time periods in seedling establishment (after I and 3 growing seasons) in response to fertilizer, stock size, vegetation control, and soil moisture treatments. Two separate experiments...
A series of studies and replicated field sites were implemented in the Oregon Coast Range within Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) sapling plantations infected with varying levels of Swiss needle cast (SNC) caused by the fungus, Phaeocryptopus gaeumannii (Rhode) Petrak (PG). This research was conducted to understand the effects of...
Soil physical, chemical, and biological components as well as climate and physiographic characteristics can interact to have a great effect on forest regeneration and seedling growth response to different establishment activities. The objective of this project was to increase the understanding of the interactions between soil type, controlled-release fertilizers, and...
Two-year-old ponderosa pine (Pinus ponderosa Dougl. ex Laws.) seedlings from two Oregon seed sources were lifted three times in the fall, stored below freezing (-1.5°C), and compared to seedlings that were handled conventionally (spring lifting followed by short-term cold storage, 2-4°C). Based on patterns of budbreak in a greenhouse and...
To study the combined effects of seedling quality and fertilization at the time of planting, three experiments were established in western Oregon during the winter of 2000. The first experiment investigated the effect of preplanting rootvolume and fertilization rate on the field performance of 1+1 Douglas-fir seedlings during two growing...
Two-year old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings from two seed lots of different predicted hardiness levels were grown in two separate nurseries. Seedlings were lifted every four weeks from early October 1991 through March 1992 and exposed to controlled freezing temperatures. Fluorescence emissions of the seedlings were measured prior...
Approximately 3-4 month-old containerized Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings (seed zone 262 and 271) were subjected to 6 moisture stress treatments (65, 53, 41, 29, 17 and 7% soil water content by volume of dry soil) starting July 4 to September 22, 1991 at Forest Research Laboratory's greenhouse at...
Transplant shock was induced by applying a range of soil water contents to unstored and cold-stored two-yearold (2+0) bareroot Douglas-fir seedlings graded by root volume. Moisture stress had the greatest influence on
morphological characteristics commonly associated with transplant shock. Terminal growth, lateral growth, stem diameter growth, and needle length increased...
Coastal Douglas-fir (Psuedotsuga menziesii (Mirb.) Franco) 1 + 1 seedlings were fertilized with two types of fertilizers (NB4NO3+K2SO4 and (NH.4)2 SO4+KC1) at four rates (0, 80, 160, 320 kg N and K/ha) split over 3 application dates (September 19, October 13, November 1, 1996). By January 10, total Kjeldahl nitrogen...
Douglas-fir (Psudotsuga menziesii (Mirb.) Franco) seedlings were outplanted on eight dates (every three weeks from mid-August 2005 through mid-January 2006). On each plant date, seedlings from a conventional dormancy (CONV) induction treatment, including moisture and nutrient stress, and a shortened daylength (SD) treatment were outplanted on three western Oregon sites...
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...
Early in the establishment of Pacific Northwest conifer plantations, herbaceous weeds often decrease seedling growth through competition for soil moisture during the dry summer months. Critical period studies have reported that reductions in competitive weed cover are necessary during the initial years of establishment to avoid reductions in seedling growth....
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...
Two-year-old Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] seedlings of two seed sources raised in three nurseries in Oregon and Washington were tested for differences in frost hardiness from September 1985 to March 1986. The objective of the study was to determine whether nursery location had an influence on seedling acclimation, deacclimation...
The efficiency of powdered corncob as a tablet disintegrating
agent was compared to that of a number of wood products and to
starch, the most popular agent used today. Corncob appeared to
be superior in its disintegrating effectiveness.
The optimum particle size, at which powdered corncob produced
its best disintegrating...
The production of C¹⁴O₂ metabolized from glucose labeled in
specific carbon atoms by homogenates of chick embryonic and adult
heart was compared by the radiorespirometric technique. Homogenates
of early (two to five days of incubation) embryo hearts were
found to utilize the phosphogluconate pathway of glucose catabolism
to a greater...
A study has been made of ointment bases prepared from
mineral oil thickened with Bentone 38 gellant.
The experimental work was divided into two distinct
parts: (1) the development of ointment bases using the Bentone
gellants, and (2) subsequent comparison of these bases
with White Petrolatum, Plastibase Hydrophilic, and other...
An
investigation was
made
into certain
aspects
of
protein
synthesis
at
different
developmental stages
of the
flesh fly
Sarcophaga
bullata.
This
included
measurements
of the
incorporation of
labeled
amino
acids into
protein
by intact cells
from
a
single
organ, the
larval
fat
body,
and
a
study
of
amino
acid
activating...
Selected nonionic surface active agents, incorporated in various
ointment bases, were applied to normal rabbit skin daily in an attempt
to determine their chronic toxicity. The dermatitic effects of these
surfactant preparations were evaluated by three methods: gross observation,
histological examination and biochemical techniques. The
results indicated that the tested...
A programmed unit on diabetes mellitus was written
and tested on three groups of students. These included a
class of licensed practical nurses taking a refresher
course in pharmacology, a class of third year pharmacy
students, and a class of first year students enrolled in
a three year nursing program....
Carnitine, acetylcarnitine, and long-chain acylcarnitine concentrations
were determined for heart, brain, and liver of chick
embryos during various stages of development. The total carnitine
concentration was approximately the same in all three organs and
showed only small variations during development. Acetylcarnitine
was not detected in any organ until the seventeenth...
Unit dose drug distribution systems have been established in a
number of hospitals during the past several years. Such systems show
promise in providing better and safer patient care. They also seem to
minimize the non-professional aspects of drug handling by nurses,
thus enabling them to spend more time with...
The purpose of this study was to ascertain to what degree, if
any, there was a difference of opinion among students, parents and
faculty in regard to student behavior as that behavior pertained to
general conduct, drug use, mischief, sex offenses, drinking, cheating
and theft.
The research study was conducted...
Computer oriented techniques and procedures are presented for the analysis of single and multiple cable systems. Application is made to a two-point mooring system influenced by surface and subsurface hydrodynamic loading. The effects of the various parameters are presented and the numerical method is compared to exact solutions obtained from...
The activity of deoxyribose-phosphate aldolase was determined
in chick embryo brains, hearts and livers during the course of development.
Assays were made in the direction of synthesis of deoxyribose-5-phosphate. Low levels of activity in the brain and heart
remained constant throughout the course of development. Activity in
the liver expressed...
Medication error rates have long been a subject of interest
among the pharmaceutical, nursing, and medical professions. The
basic purpose of medication error studies has been to discover the
quantity and type of errors which exist, thus enabling the investigator
to evaluate the relative safety of various drug distribution
systems...
In order to assess the importance of RNA synthesis in the induction
and antibody-producing phases of immune responses, actinomycin
D was used to inhibit the primary and secondary in vitro immune
responses of mouse spleen cells against heterologous erythrocytes.
The presence of actinomycin D (0.1 or 0.125 μg /ml) throughout...
This is a fundamental study of the mechanism of protein particle
removal during flow through sandy soil. Mathematical models for
diffusion-adsorption and diffusion-convection-adsorption processes
were developed and compared with experimental data. An attempt was
made to calculate the distance over which the adsorption forces act.
The differential equation for the...
The purposes of the study were twofold: (1) to compare selected
personality traits of male and female interscholastic and intercollegiate
athletic coaches with standardized norms for personality
traits established for all men and women, and (2) to compare personality
traits of interscholastic male and female athletic coaches with
the personality...
The purpose of this investigation was to identify sources of
influence on one major growth trend for college students: the development
of autonomy. Specifically, the study focused on whether
change in autonomy in college freshmen was related to the background
of the students, their associations with peers, their contacts with...
For over a hundred years, analysts have been concerned with
the static and dynamic behavior of flexible cables. Hanging,
towing and mooring cables have been extensively examined but little
work has been done in the area of the anchor deployment problem. In
the anchor deployment problem, a mooring line is...
The purpose of this study was to investigate the change in perception
of the university environment that occurred in students who
participated in two forms of university governance at Oregon State
University. Students who participated as members of joint student-faculty
committees (university committees) were compared with members
of all-student committees....
This experiment was designed to investigate the in vivo effects of calcium ions on tetracycline absorption when oral doses of tetracycline and calcium-containing medications were administered concurrently. Twenty-one human volunteers were selected and divided into three equal-sized groups: Group A, Group B, and Group C. Each volunteer in Group A...
Introduction. The study was conducted in response to a need
for systematic analysis of the practice of granting academic credits
for prior off-campus learning. It was stimulated by a commitment
to the goal of facilitating student development and an interest in the
theory that such development can be enhanced through...
The competencies of athletic coaches in selected Oregon
high schools were analyzed to determine the agreement among
various groups of coaches and principals as to what represents
success in high school coaching, and the agreement among groups
of selected coaches and principals in their assessment of the
importance of these...
Beginning with the basic equations from the theory of elasticity
and employing a model of crack propagation based on the concept of
a constant plastic energy absorption per unti of crack extension, the
commonly accepted power law of fatigue crack propagation was derived.
This derivation uses an extension of the...
Purpose
This study compared existing Oregon elementary school physical
education facilities and equipment with those facilities and equipment
items perceived to be essential for a quality physical education program
by nationally selected physical education specialists.
Procedures
A survey form was mailed to 110 national educators proposed by
state directors of...
The development and evaluation of a system for the handling, maintenance
and transcription of nursing home patient care orders are
described.
Before implementation of this documentation system, the study
nursing home was found to be out of compliance with various state,
federal and professional practice standards related to patient care...
The exact frequencies and mode shapes of flexural vibration of a
rotating beam are found. The beam has a linear mass and stiffness
distribution.
With certain simplifying assumptions, the kinetic and potential
energies of the rotating beam are found. Hamilton's principle is then
used to determine the equation governing the...
The identity and distribution of ant species preying on the
western spruce budworm (Choristoneura occidentalis Freeman) was
investigated in eastern Oregon and western Montana. A sticky trap was
developed to index ant foraging activity in the canopy by intercepting
ants falling from the tree as they traveled between canopy and...
The purpose of this study was to evaluate the student personnel
services rendered at a public two-year community college. The institution
chosen for the study was Lethbridge Community College, located
in Lethbridge, Alberta, Canada.
Six hundred and one people, representing seven population groups,
were randomly selected for participation in this...
The purpose of this investigation was to ascertain if there are
differences in attitudes among married males, married females,
single males, and single females toward 11 attitudinal variables.
More specifically the study focused on the impact of the college
environment on married students.
The students who participated in the study...
Solid phases that form under the influence of changing environmental conditions often record such changes in their chemical composition. Quantification of these compositional variations is invaluable in reconstructing paleoenvironmental changes. Laser ablation, employed as a solid sample introduction system, offers fine spatial resolution (50 - 250 [mu]m) for spectroscopic analysis...
The role of synthesis and degradation in controlling enzyme
concentrations was studied.
Concentrations of chloride and arginine were determined for
blood and liver at various stages of development from the embryo to
the 8 day old chicken. The chloride concentrations were used to
obtain the volume of extracellular blood in...
This study sampled the work activities of community pharmacists in eighteen western Oregon pharmacies (9 chain and 9 independent, stratified by daily prescription volume). Utilizing a technique of recording at least 960 observations in each pharmacy, a total of 41,542 observations were recorded into 28 mutually exclusive task activity categories....
A time domain simulation model which approximates the
three-dimensional velocity fluctuations of wind turbulence
has been developed. This model is used in a discrete time
control algorithm to regulate the output torque of a wind
turbine by changing the pitch angle of the turbine blade.
The wind model provides a...
Allowable stresses in compression perpendicular to the grain (C-perp) have been too conservative for most structural uses. This study develops stress data for deformations beyond the proportional limit (PL), up to 0.1 inch for hem-fir. Fifteen boards from four western states were cut into small specimens representing three ring angle...
I assessed potential barriers to dispersal using homing tendency and investigated the movements and settlement site selection of pygmy rabbits (Brachylagus idahoensis) after short distance translocations in southeastern Oregon from June – December 2008. I captured, radio marked, and translocated 59 pygmy rabbits 1-2 km across landscapes with (1) continuous...
Using clones to regenerate a species new to clonal reforestation presents the forest manager with many problems. A number of interrelated and interdependent research and development activites are needed to answer these technical questions. Network diagraming was used for scheduling research activities and for indicating interdependencies among activities. The resultant...
Large barite (BaSO4) structures mark cold seeps in the southern San Clemente Basin. Barium flux to San Clemente sediments is two to three times greater than fluxes measured in surrounding California Borderland basins. Analyses of sediment trap material, water column samples, sediments and pore water indicate that expected bariumbearing mineral...