As part of investigations to evaluate the suitability of sheep grazing in Douglas-fir (Pseudotsuga menziesii) plantations of Oregon's Coast Range, this research was designed to evaluate the effectiveness of sheep grazing in suppressing unwanted vegetation, determine seasonal variations in forage quality, and investigate the impact of sheep grazing on big...
Sheep live weights, herbage standing crop, and herbage quality
are presented from a three-year grazing management study comparing
set stocking, four-paddock rotational grazing, and four-paddock
forward rotational grazing systems. In both rotational grazing and
forward rotational grazing systems, sheep were sequentially moved
from one paddock to the next every 5...
Early studies on the biosynthesis of the quinoline quinone portion of
streptonigrin, 1, had suggested the intermediacy of novel aromatic amino
acids. In order to test this hypothesis, a series of compounds was synthesized
and tested for potential incorporation. [4-¹⁵N] 4-Aminoanthranilic acid,
4 5 a , [4-² H] 7-aminoquinaldinic acid,...
A diagnostic modeling study of the cloud and precipitation
processes, and also frontogenesis have been analyzed in a severe
narrow cold-frontal rainband with the aid of a three-dimensional,
diagnostic cloud model.
The results of the model simulations indicate that the heavy
precipitation just behind the surface cold front was associated...
This study examines the relationships among variables influencing
solar access in the Portland-Vancouver Metropolitan Area. The
analysis is based on a random sample of approximately 400 single-family
homes in 21 local jurisdictions outside the city limits of Portland.
Relationships between percentage of available sunlight and selected
variables were examined by...
Financial stress in agriculture has been a concern over the past
century. Agrarian values and "love of the land" seem to yield public
conclusions for the support of the industry. Much of this support is
in the interest of preserving a viable food producing sector in an
volatile world climate....
The performance of pull factors for total retail sales in Oregon's
nonmetropolitan counties during the economic cycle of boom, bust, and recovery
of the early 1980s is examined for geographic patterns. One regional pattern and
several county patterns are identified and discussed. Counties having the highest
and lowest pull factors,...
The dynamical processes which maintain atmospheric disturbances
in regions of strong wintertime variability of the northern hemisphere
are examined using data from a GCM simulation. Time series of the
dependent variables and diabatic heating components from 10 Northern
Hemisphere winters simulated by the Oregon State University two-level
GCM are used....
This study is mainly concentrated on examining the positive cloud-to-ground lightning activity associated with Mesoscale Convective Systems. Six MCS events which occurred during the O.K. PRE-STORM program in 1985 are studied. Data indicating the location and polarity of the cloud-to-ground lightning flashes from a lightning location network are analyzed in...