Several studies were conducted to determine the effect of weed
density on herbicide efficacy. Diuron [3-(3, 4- dichlorophenyl) -1, 1-
dimethylurea] was tested on various densities of Italian ryegrass
(Lolium multiflorum Lam. ) under greenhouse and field conditions.
Cycloate (S-ethyl N-ethylthiocyclohexanecarbamate) was tested on
green foxtail (Setaria viridis (L. )...
Major emphasis of this research study involved the evaluation
of nutrient transport by overland flow. Samples gathered at various
distances relative to a swine-waste spray irrigation system were
used for the nutrient evaluation.
As a result of this study, the following conclusions are made:
1. It is improbable that the...
Interval arithmetic is applied to the problem of obtaining
rigorous solutions to integral equations on a computer. The
integral equations considered are the linear Fredholm equation of
the second kind and the nonlinear Urysohn equation. Techniques are
presented which enable the computer to find an approximate
solution, prove the existence...
This study was undertaken as a result of an interest in the
present and future purposes and functions of higher education.
American society and higher education are moving through a period
of change. Since each shapes and is shaped by the other, change in
either may require a review and...
In the summers of 1973, 1974 and 1975, I investigated population
age structure and density, and behaviors relating to habitat
selection, predator avoidance and intraspecific interaction in a population
of northwestern salamanders in a lake in the Oregon Cascade
Mountains. The study was carried out by skin- and scuba-diving at...
This study was designed to investigate the effects of group
counseling on the self concept and academic achievement of high
school sophomore health classes. Specific hypotheses to be examined
were:
1. The experimental group will evidence more improvement in
academic achievement score than will the control group.
2. The experimental...
The main objective of this study was to identify family life
competencies needed by high school graduates, as perceived by a
majority of respondents. In addition, the null hypothesis tested was:
that age, sex, and educational level are each independent of response
on each individual competency statement. Testing was done...
This thesis describes a Mossbauer effect and electron
paramagnetic resonance study of iron (III) tetraphenylporphyrinatobenzenethiolate
benzene thiol, an analog compound
for bacterial cytochrome P-450. The compound is unusual in
that it provides a model for the two ferric reaction states
of cytochrome P-450. The iron in the model compound exhibits...