Changes in the structure of the U.S. agricultural
industry since World War II have transformed it into a
highly productive component of the domestic economy. But
these changes have not occurred without indirect costs. For
example, the reliance on agricultural chemicals has produced
environmental effects causing growing concern. In addition,...
In recent years, considerable attention has been focused on the application of
orthogonal expansions to system analysis, parameter identification, model reduction
and control system design. However, little research has been done in applying their
useful properties to Power System analysis and control. This research attempts to
make some inroads in...
The encroachment of alien weeds onto western rangelands is one of the most perilous and perhaps least recognized problems facing land managers today. Oregon rangelands are under siege from ever-increasing numbers and distribution of exotic weeds. They threaten Oregon's economy and environmental quality by reducing livestock forage, wildlife habitat, watershed...
Two studies concerning low molecular weight organic acids in soils were conducted. In the first study, anion exclusion chromatography was used to separate and identify 12 common organic acids, and the accuracy, precision and detection limits of the method were determined. The method was found to be sensitive and accurate...
Four experiments were conducted during spring, late fall, and winter seasons using commercial broilers to investigate the suitability of different types of chopped Willamette Valley grass seed straw as litter for broiler production. Chopped annual rye grass straw and pelleted rye grass straw are more suitable litter than chopped rye...
Oyster production in the United States has declined from a leading
nineteenth century fishery to a minor, failing industry. Oystermen must now
depend on a diminished resource in an environment of competing and conflicting
coastal uses. One of the most important influences on the industry's welfare
is the sanitation of...
Understanding the association between growth rate and wood properties is of practical importance to maximizing and sustaining wood and fiber production. Anatomical characteristics, specific gravity, and bending properties were determined at breast height for thirty 7-year-old trees with varying growth rates, from a red alder (Alnus rubra Bong.) plantation. Wood...