Maturation rates of monogerm sugar beet seed grown in Western
Oregon were measured quantitatively to determine attainment of maximum
seed development and germination. Seed was collected at various
intervals after anthesis from two hybrid varieties representing the
extremes in resistance (hard bolting) and susceptibility (easy bolting)
to seedstalk development. The...
Field, greenhouse, growth chamber and laboratory experiments
evaluated factors affecting establishment, survival and production
of birdsfoot trefoil (Lotus corniculatus L.) and alfalfa (Medicago
sativa L.)
Field studies investigated the effects of a barley companion
crop, seedling year harvest management and nitrogen and phosphorus
fertilization upon stands, survival and subsequent production...
Studies were conducted to establish some characters which
could be used, either in the field or in the laboratory, to differentiate
between annual ryegrass (Oregon), Lolium multiflorum Lam. , and
Linn perennial ryegrass, Lolium perenne L.
Vernation, percentage of glumes covering the spikelets, and
height of seedlings seem to be...
At liquid nitrogen temperature the spectra of sublimed
films of NH₄NCS, both as phase I (the usual form stable at
room temperature) and phase II (the low temperature form),
exhibit detail usually reserved for gases at low pressures.
In both phases the symmetry of ammonium ion has degenerated
from tetrahedral...
Four surface and three subsurface horizons of agriculturally
important Oregon soils were exposed to excessive volumes of anhydrous
ammonia and reequilibrated with the atmosphere for several
time periods prior to extraction with water. The carbon solubilized
was determined by a modified wet combustion technique. Nitrogen
in the soils, extracts, and...
The purpose of this paper was twofold, (1) to determine the
distribution of the infective stage of Ceratomyxa shasta (Noble) in the
Deschutes River basin, and (2) to study the ultrastructure of the spore
stage of the protozoan parasite.
Liveboxes containing juvenile rainbow trout were placed at
specific test points...
In communications it is often desirable to recover a signal
hidden in noise. The techniques of correlation are often employed
for this purpose. Initially, the basic formula and properties of correlation
including an approximating formula are presented. Then the
description, design, and construction of a DC to 500 KHz electronic...
This project was initiated to determine the incidence, distribution
and species of fish affected by Ceratomyxa shasta in Oregon
waters. Returning adult Pacific salmon and steelhead trout were
chosen for the survey because they were known to be susceptible to
infection. The parasite was also believed to be an important...