Many agricultural fields are burned in the Willamette Valley
of Oregon during the summer for economic reasons. A major air
pollution problem results from these burnings. The purpose of this
study was to develop relations between the maximum plume height
and some of the independent variables affecting this plume height,...
The selenium-responsive syndromes and the discovery of
Factor 3-selenium focused attention on selenium in metabolism. Two
hypotheses have been advanced to explain the metabolic effect of
selenium: 1) substitution or sparing of alpha tocopherol, and 2) a
primary role in metabolism. The first hypothesis is supported by
Scott and Desai,...
The feeding habits of the lanternfishes Tarletonbeania crenularis, Diaphus theta and Stenobrachius leucopsarus were studied by analyzing 1,735 stomachs from 54 collections from the slope waters off Newport, Oregon. Forty-one taxa of food items were identified. Euphausiids
(Euphausia pacifica), copepods (Calanus spp. and Metridia lucens) and amphipods (Parathemisto pacifica) were...
To observe the effects of oviposition as related to time of insemination
on fertility, four trials were conducted in which individually
caged White Leghorn hens were artificially inseminated with 0.05 cc
of undiluted mixed semen obtained from 4 to 5 cockerels. These inseminations
were made at 9:45 a.m. , 10:00...
In the construction of a cab-over-engine semi tractor, Freightliner
Corporation of Portland, Oregon uses brackets to make the connection
between the front leaf spring mounts, bumper, front hinges
for the tilt-cab and the longitudinal frame rails. One bracket is used
on each side. The integrity of these brackets is essential...
The object of this research was to study the effect of readily
available carbohydrates (RAC) upon the utilization of urea in fattening
rations and to determine the effect upon carcass characteristics
that determine quality and yield grades. A 2 x 2 latin square designed
feedlot trial comparing urea at 0.5%...
Rates of birth, death and population change were calculated for Cyclops sp. and Diaptornus forbesi in Soap Creek Ponds V-VIII near Corvallis, Oregon during the interval April, 1968 to April, 1969. An egg ratio method was used in calculating these rates. Duration of development of the eggs of both species...
This thesis presents an economic analysis for a proposed toll
road which is to separate different types of traffic such as pedestrians,
slow speed vehicles and high speed motor vehicles, and to
divert through traffic from the local roads. The use of a toll road
usually provides significant savings in...
The control of filbert (Corylus Avellana L.) suckers by means
of herbicides was investigated in three phases during 1968 and 1969.
(1) Screening trials, on canned filbert trees in the greenhouse, to
determine the effectiveness of various herbicides and concentrations
in controlling vegetative growth. (2) A summary experiment in the...
The biomass and the composition of 15 stands of red alder (Alnus rubra Bong.) on river bottom sites in western Oregon was measured during August and early September, 1969. These stands ranged in age from two to 64 years. Biomass was found to vary from 134 k/ha (kilograms per hectare)...
Improved methods for automatic translation of Chinese characters
to English, using a scanner coupled to a digital computer, are
described. Included are computer techniques of locating, describing,
and recognizing different strokes for translation of the character.
Chemicals are being sought that can control weeds in lettuce
under different environmental conditions, soil types and weed populations.
The extensive or repeated use of a herbicide may lead to important
changes in the weed population which call for new materials
that can take care of the modified situation.
In...
Phosphate, silicate and nitrate concentrations in the sea off
the coast of Oregon were determined to study their seasonal distribution
patterns. The water samples were collected monthly along the
east-west hydrographic line off Newport, Oregon, from the shore to
165 miles (310 km) offshore. The samples were analyzed by both...
The purpose of this study was to determine if infection levels of dwarf mistletoe on ponderosa pine could be detected with color aerial photography. The photography was taken in early September using Kodak Ektachrome Infrared Aero and Ektachrome Aero films at scales of 1/4000, 1/2000, and 1/1000. Ground truth consisted...
The morphology and genesis of soils of the Willamette series
and of some Willamette-associated soils and their relationships to
geomorphic surfaces were studied in an area near McCoy, Polk
County, Oregon. Influences of regional extent, such as climate and
parent material, were related to the soils and landforms. The soils...
The reproductive characteristics of the mountain cottontail
rabbit, Sylvilagus nuttalli (Bachman), were investigated from 269
specimens collected in central Oregon between 28 May 1968 and
28 August 1969.
Male rabbits were in breeding condition between mid-February
and 3 July 1969. Nearly 77% of the females bore four litters between
7...