In 2020, Oregon suffered one of the worst wildfire seasons on record, with a higher percent of forest area burn, the destruction of residential areas, and the risk to human health. The level of intensity of these wildfires were due to the effects of climate change and Oregon wildfire seasons...
Successful conservation management requires an understanding of how species respond to intervention. Native and exotic species may respond differently to management interventions due to differences arising directly from their native or exotic origin (i.e., provenance) or from differences in life-history or phylogenetic lineage that are associated with provenance. Thus, selection...
This work furthers the understanding of processes occurring in catchments that affect stream nitrate concentrations using two different approaches: a temporally intensive case study of three headwater catchments with varying land use (through storm event monitoring) and a spatially intensive study on the regional scale (through statistical modeling) of 1st-4th...
This document contains a result of a study to determine the role of hatchery-reared winter steelhead in steelhead fisheries. The study examines the contribution of these salmon ‘with respect to’ angling intensity, number of fish stocked, contribution of native stocks, and several other factors. It also investigates survival of hatchery-reared...
The successful agriculture of the United States is in part the
result of the productive effort of the agricultural experiment stations.
Students from different countries, throughout the world, have visited
the United States to learn and observe the programs of the various
experiment stations with the hope of being able...
Wheat is an important cereal crop in the Willamette Valley of
Oregon and the stiff-strawed, high-yielding varieties are the predominant
types grown. Observation of the effect of seeding rates
on the yield and yield components are useful in determining which
of the components contributes most to the yield of a...
A design for an agricultural airplane is developed and evaluated,
A biplane configuration was adopted since it provides better maneuverability
and stall characteristics than a monoplane of comparable
size and design simplicity. The airplane, powered by a 600-horse-power
Pratt Whitney radial engine, was sized to carry a useful
load of...
The general theory of characteristics is reviewed for hyperbolic
partial differential equations of n independent variables. The
application of the theory of characteristics is made to unsteady, two-dimensional, rotational, inviscid flows; unsteady, two-dimensional,
irrotational, inviscid flows; and unsteady, axial symmetric, inviscid
flows. The characteristic surfaces and the compatibility relations
are...
Computers
are
very
efficient
in
handling
the
problems
which
deal
with
iteration.
Numerical
treatment
of
the
unsteady
energy equation
is
one
sort
of
iteration.
The
convergence
of
the
unsteady
film
coefficient,
in
two
dimensional
space,
to
its
steady
state
value
has
been
deduced
by
comparison
of
the
results
of
the...