Concerns regarding the most effective means of evaluating
segregating generations of spring barley prompted this investigation. Three methods of selection were considered: bulk, pedigree, and single seed descent. F₆ lines derived by each method
were grown in a replicated yield trial. The effectiveness of each
method was measured in terms...
Published November 1984. 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
Published June 1986. 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
Published July 1981. 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
The purpose of the present study was to investigate the effect
of a number of physical and chemical attributes upon muskmelon
texture as described by sensory evaluation. Measurements of turgor
pressure, percent moisture, total sugars, alcohol-insoluble-solids,
three pectic fractions, total pectic materials, starch and cellulose
were performed on 50 melons....
The volatile flavor fraction of lightly milled wheat grown in
eastern Oregon was isolated for study by two methods: steam distillation
under vacuum and steam distillation at atmospheric pressure.
The sample obtained under vacuum was extracted with ether
which was then evaporated to yield the desired wheat essence.
Steam distillation...
The volatile components of rye flour were isolated
by steam distillation and trapped in cold traps under
vacuum. After preliminary tests indicated the presence
of carbonyl compounds, the distillate was reacted with
2,4 dinitrophenylhydrazine to convert the carbonyl compounds
to their stable derivatives, 2,4 dinitrophenylhydrazones.
Three classes of monocarbonyls were...
The purpose of the research was to investigate the chemical
composition of five starches and the physical characteristics of their
respective starch pastes as these properties relate to the characteristics
of starch-structured breads. Starch-structured breads were prepared
with five starches, corn, wheat, potato, arrowroot and waxy
maize, used as granular...
Published January 1982. 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
Wild turkeys (Meleagris gallopavo) were first successfully introduced into Oregon and Washington in the 1960s; the population has grown in size and expanded in distribution to a point where it provides an important recreational hunting opportunity in both states that generates significant funds for habitat conservation and contributes financially to...
Meadowfoam (Limnanthes spp.) is a potential oil seed
crop being developed for commercial production in the
Willamette Valley. The seeds are characterized by poor
germination at warm temperatures. It would be desirable
to overcome this temperature-related dormancy problem so
that better stand establishment could be realized from
early fall planting....
Two of the most powerful ways in which humans have altered ecosystems are by increasing productivity and changing the densities of important consumers. The bottom-up effects of productivity and the top-down effects of consumers have been identified as primary determinants of biological diversity, though the links between them remain unclear....
Urban stormwater runoff contains pollutants that have a detrimental effect on pond water quality and watershed water quality. Stormwater best management practices (BMPs), such as a constructed wetland, can treat these pollutants through processes like infiltration, adsorption, and plant uptake. It is hypothesized that the surface-runoff fed pond at Bruce...
Ecosystems are facing increasing threats from human related activities, such as overfishing, pollution, habitat destruction, species invasions, and diseases, among others. While oceanic islands provide natural laboratories to understand ecological and evolutionary process, they are also particularly vulnerable to these impacts, given their usual isolation from the mainland and the...
Lichens play many important roles in subarctic terrestrial ecosystems by fixing nitrogen, colonizing rock and gravel, stabilizing otherwise bare soil, adding significantly to vegetation biodiversity and serving as the primary food for caribou in the winter. In these chapters, I analyzed lichen community and ecological trait structure along environmental gradients,...
The North Pacific humpback whale (Megaptera novaeangliae) population has been increasing at an average annual rate of ~6% since the early 1990s. In northern Southeast Alaska alone, there are now more whales than estimated for the entire North Pacific several decades ago. An understanding of how this growing population is...
One of the tasks of inequality reasoning is to determine the relationship between two quantities for any given set of qualitative constraints. For implementation of this kind of reasoning, Simmons [1] has provided a technique called the "graph search" (GS). This paper briefly reviews GS technique, then presents an implementation...
The multifaceted role of the environment in regulating the structure and dynamics of biological communities has long fascinated ecologists and motivated much debate and research. Now, in a time of accelerated global changes due to human impacts, the need to understand how the environment shapes communities has gained new urgency....
Number of harbor seals, counted on 32 haul-out areas in Oregon, increased by 6 - 8.8 % per year from 1975 - 1983. Percent of seals in bays has increased an average 1.8%/year, from 47% in 1975 to 61% in 1983. Along the central Oregon coast, harbor seals were most...
Policy decisions in fishery management are becoming increasingly
complex and difficult. This is especially true for the salmon fisheries
where policy outcomes affect the productivity of the salmon
resource and the subsequent well-being of commercial fishermen, charter
boat operators, Indian fishermen, and sport anglers. The objective
of this study was...
Growing demand for limited quantities of fish has led to systematic
planning for the conservation and management of U.S. fishery resources.
There is a need for better understanding of the complex biological and
social environment on which regulation for conservation, social, and
economic purposes is imposed. The behavior of commercial...