Farm equipment is becoming an increasingly important
financial asset for many farmers. Tractors probably represent the
single largest component of equipment asset value. As such, changes
in tractor values can have a dramatic effect on a farmer's financial
situation. Changes in equipment value can be attributed to
depreciation and the...
This study examined the relationships between the frequency of occurrence and severity of Douglas-fir dwarf mistletoe (Arceuthobium douglasii Engelmann), environmental and stand conditions, and plant communities in the Southern Oregon Cascade Mountain Province. Data for the study was collected from the same ecology plots that were previously used to define...
The middle Deschutes River between Bend, Oregon and Lake Billy Chinook typically experiences critically low flows during the irrigation season. Commercial agriculture in the North Unit Irrigation District and Central Oregon Irrigation District is one major user of Deschutes River water. The overall objective of this research was to estimate...
Agronomic research documents a strong correlation
between the level of irrigation water applied and the level
of farm chemicals leached into water bodies. Consequently,
policies that cause farmers to alter irrigation water
management practices are likely to influence water quality.
Water markets are a potentially attractive method of
addressing agriculturally...
Concerns over the possibility of exotic pest
introductions from eastern Russia to the West Coast of the United States due to proposed log imports raises the question of the effectiveness of possible mitigation measures. Toxicity of methyl bromide to representative pathogenic fungi was tested by exposing Armillaria ostoyae, Heterobasidion annosum,...
Increasing water demand for growing municipalities, for water-based recreation
and for fishery and wildlife habitat has intensified pressure on the existing resource. Reallocation of water from existing uses to other, higher-valued uses is receiving greater attention due to constraints on development of new water supplies. A key to reallocation is...
Improved accessibility in remote noble fir (Abies procera Rehd.) stands and the
realization of the value of noble fir wood have led to increased pressure to enter and
actively manage noble fir stands in Oregon and Washington. This study examined the
incidence of infection and decay caused by Heterobasidion annosum...
The West is undergoing a period of change where water
rights, range rights, and other attributes historically
attached to land, are being reevaluated. To date, not all
of these relationships have been hammered out or confirmed
to exist. One such example of this is Klamath County,
Oregon. Here we see...
A series of studies, in three western Oregon Douglas-fir plantations, was conducted to understand the physiological impacts of Swiss needle cast on Douglas-fir physiology. Four aspects of the disease complex were investigated: fungal colonization and assessment, plant-water relations, carbon assimilation and interaction with climate. Several techniques were developed and used...