Grass seed producers in Oregon's Willamette Valley have
employed the cultural practice of post-harvest open field burning
since the mid-1940's for purposes of field sanitation and crop residue
disposal This practice creates environmental quality problems of
air pollution during the late summer Recent public concern over
the valley's environmental quality...
Incorporating catch or harvest rate information in repeated-choice recreation fishing demand models is challenging, since multiple sources of information may be available and detail on how harvest rates change within a season is often lacking. This paper develops a framework for evaluating which source(s) of information should be used to...
Published November 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
In Oregon’s northern Willamette Valley, cabbage maggot (CM), Delia radicum (L.) (Diptera: Anthomyiidae) often renders Brassica root crops unmarketable. Scheduled insecticides are the only current control. Studies were conducted to: 1) describe and characterize spring emergence of CM flies and their seasonal flight activity relative to degree-day (DD) accumulations; 2)...
The shake and wash technique (samples placed in a jar with alcohol added and
shaken to remove the mites) was effective in removing 100% of the predator mites, and adult
spruce spider mites from Douglas-fir foliage and 98% of the spruce spider mite nymphs.
Eighty-eight percent of the spruce spider...
Winter wheat is commonly grown in rotation with leguminous and non-leguminous crops in the Willamette Valley. For agronomic, economic, and environmental reasons it is important to understand the influence of previous crops on availability of N and other nutrients. Objectives of this study were: (1) to evaluate the effects of...
Biology of Scaptomyza apicalis Hardy (Diptera: Drosophilidae) was studied in
relation to its host, meadowfoam, Limnanthes alba, a recent oil seed crop grown in the
Willamette Valley, Oregon. Populations of flies and larvae were monitored weekly over
three consecutive crop-years beginning in 1996. Yellow sticky traps gave relative
population estimates...
There are typically two responses to the complex environmental problems of our time: 1) doom and gloom and 2) optimism. There is a lot of doom and gloom in the environmental literature. This literature warns that the future portends danger for humans and their life support systems. But when one...
An investigation of the fishes of the Willamette River and three of its larger tributaries was made during July, August, September, and November of 1951, to ascertain the possibility of using them as bio-indices of pollution. Thirteen stations were established on the Willamette River and tributaries. These stations were selected...
Mounting inflationary economic pressures and the obvious spiralling costs of education, at all levels, has drastically augmented public, administrative, and government concern regarding the effectiveness of many educational training programs. Secretarial Science, which is designed to provide occupational-level training represents such a program. Therefore, this study was conducted in order...
The Purpose of the Study
The central purpose of this study was to identify the common
competency elements deemed necessary for entry-level vocational
certification and to develop these elements into groups that would
serve as a basis for use in an occupational competency test. Questions
to be answered from the...
The purpose of this study was to compare the effectiveness of a
learner-centered teaching system and that of a conventional teaching of
basic electricity to university students. For this study 65 students
enrolled in basic electricity at Arizona State University in Tempe,
Arizona were used, distributed in two fall semester...
The purpose of the study was to identify a list of skills, knowledges and related factors that are common to fourteen occupational cluster areas representative of the work community of Oregon. PROCEDURES A list of skills, knowledges and related factors needed for successful employment was derived from existing task analyses...
There were six major objectives of this study. The first was to
identify the common career education competencies that elementary
and/or junior high school teachers should have as they adopt and
utilize the concepts of career education. The second purpose was to
identify where, in the professional preparation of the...
Purpose of the Study:
The purpose of this study was to identify and compare the current
written philosophical expressions of industrial arts with the
acceptance of these by select groups of industrial arts teacher educators.
Procedure:
The data for this study were obtained through the use of a
questionnaire derived...
Black vine weevil (BVW), Otiorhynchus sulcatus Fabricius, is a serious pest in cranberry, Vaccinium macrocarpon. Larvae feeding below the soil surface cause damage to the roots and underground stems. Knowledge is sparse in regard to the damage potential of BVW in Pacific Northwest cranberry beds. Control with insecticides is limited...
Fishers (Pekania pennanti) are medium sized mustelids endemic to North America. Two fisher populations persist in Oregon: an indigenous population in southwestern Oregon, and a reintroduced population in the southern Cascade Mountains. Despite candidacy for listing under the Endangered Species Act, current information on fisher populations in Oregon is scarce....
Forest carnivores such as the fisher have frequently been the target of conservation concern due to their association with older forests and assumed sensitivity to landscape-level habitat alteration. Although the fisher has been extirpated from most of its former range in the western U.S., it is still found throughout much...
Lumber drying accounts for about 70 percent of sawmill energy
requirements. Significant recovery of energy used to dry lumber
would result in significant energy recovery for the mill. This is
desirable because of today's high cost of energy. The objective of
this study was to recover some of the energy...
Commercial thinning operations can result in damage to residual stems. A literature review revealed that little was known about the effects of residual logging wounds with regard to rotation-age commercial conifers, particularly Douglas-fir. An experiment to examine fungal colonization of Douglas-fir following logging damage showed that while damage was significant...
Invasive plant species are expanding and transforming vegetative communities across Oregon and throughout the United States. Over the past three decades remote sensing, geographic information system (GIS), and Global Positioning System (GPS) technologies have been integrated to detect and map the distribution of noxious rangeland plants. This study developed low-cost...
Chemistry of preparing dense film from solution deposition is explored with several cases in this thesis. Surface dense structure, conversion at melting point, and ion exchange in aqueous solution are the main topics covered here for the thin films of aluminum oxide phosphate and tin dioxide. Thin film density, optical...
This paper presents a production study of a modified hydraulic excavator used for yarding and loading logs. The machine utilized in this study is a Caterpillar 245. Approximately 3067 cunits (4053 pieces) of old growth Douglas fir were logged from a 29 acre setting in the Coast Range of southwestern...
The purpose of this study was to investigate the marketing strategies of custom clothing home-based business owners by identifying selected demographic characteristics, general business information, marketing strategies, and current and potential future marketing support from members who were custom clothier home-based business owners affiliated with the Professional Association of Custom...
The change process for clients in long-term adolescent residential treatment has received heightened research attention for the past 15-year (Gass, 2006). The research indicates that individuals enrolled in long-term adolescent residential treatment centers, on average, experience improved psycho-social functioning to degrees that are statistically and clinically significant (Behrens & Satterfield,...
A series of eight trials was conducted to determine if supplementation
with arginine improved growth of young rats, Japanese quail
and swine fed low-lysine diets. In five rat trials, with a variety of
basal diets, no evidence of a "sparing effect" of arginine on the lysine
requirement was found. A...
The objective of the study was to identify and evaluate a methodology
of market segmentation analysis for use in postsecondary education
institution enrollment management. Two approaches to segmentation were
examined: A priori and post hoc., The a priori approach was based on
subject's intent to enroll at one of five...
This study evaluates the effect of an Acquired Immune Deficiency Syndrome (AIDS) prevention program on the incidence of gonorrhea among the enlisted men in the 105th Battalion of the Honduran Army. The education program was initiated as a result of the high incidence of AIDS in Honduras (more than half...
The central purposes of this study were to identify the common
professional education competencies of junior high school teachers
and to
1. Determine the proficiency levels necessary in order to
accomplish these tasks.
2. Determine the cognitive domain levels required in order to
fulfill these tasks.
The major dimensions of...
Problem
While the primary emphasis of this study was on the professional
aspects of a business teacher's preparation, by necessity it was
concerned with other aspects of the preparation of business teachers,
especially as these relate to the so-called "professional sequence."
Thus the purpose of the study was to seek...
A study is conducted to provide information useful to the future development of agro-pastoralists
in the Kolda Region through an economic and socio-cultural analysis of the
practice of stabling. Two main issues are addressed: the generation and distribution of
profits and the factors related to adoption of stabling. A partial...
In this thesis an introduction to simulation and object oriented programming discusses the need for the creation of several classes which directly support object oriented simulation. The author places no restrictions on the type of simulations that can be conducted and simulation practitioners will find that the classes provided lay...