The objectives of this study were to (1) describe
physical environmental conditions and species composition
at several sites along an Upstream/downstream gradient in a
number of tributaries of the Willamette River in western
Oregon; and (2) identify possible relationships between
species distributional patterns and physical habitat
parameters using detrended correspondence...
The passing of the 21st Amendment to the United States Constitution
has given to individual states the authority to regulate the
sale, distribution and taxation of domestically produced wines, and
made the wine trade potentially significant as a means of augmenting
In the state of Oregon, table wines...
At its peak, Oregon produced 21 percent of the nation's
total commercial strawberry production. However, since
1971, Oregon's share of strawberry production has been
declining steadily. In fact, for the last three years
strawberry production in Oregon constitutes only 8 percent
of the nation's total production, which is the lowest...
The fundamental objective of this analysis was to isolate and
identify the factors governing the demand for domestically produced
rainbow trout in a representative west coast market, and assess the
impact on that demand, if any, of the introduction of pansize salmon.
The approach taken in this market demand study...
Four winter and four spring barley cultivars along with their F₁
hybrids were grown on the Hyslop Agronomy Farm near Corvallis, Oregon,
a high rainfall site (over 1000 mm annually) located in the Willamette
Valley. The experiment consisted of four replications. Ten seeds of
each F₁ and parents were seeded...
Both Leperisinus oregonus and L. californicus are bark beetle
species which emerge from Fraxinus latifolia brood logs as sexually
immature adults and disperse to living ash. Occasional field observations suggest that, for overwintering and maturation feeding, L.
oregonus enter trunks and branches, whereas L.; californicus enter twig
crotches, buds and...
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...
Visual selection for grain yield may be a limiting factor in
identifying superior yielding genotypes in a breeding program. This
investigation was conducted (1) to compare the effectiveness of
visual selection for grain yield by three selector groups representing different levels of plant breeding experience, and (2) to
Forty-six morphological characters were used in a study of Triticum turgidum ssp. carthlicum (2n = 28) and specimens of carthlicum-like forms of Triticum aestivum ssp. vulgare (2n = 42). The morphological variation patterns within these groups were examined using stepwise discriminant analysis. These results indicate that specimens studied could be...