Growth chamber and field experiments were conducted to investigate
the effects of different temperature levels and durations on
floral induction and vegetative growth in orchardgrass. Propagules
of two clones, XLI-8 (clone R) and MID-5 (clone 0), from the synthetic
variety Pennlate, were used in all experiments.
Clone R plants were...
Samples of Russet Burbank and Kennebec seed potatoes
used by Oregon growers were grown in replicated plots at
Klamath Falls, Prineville and Corvallis. Observations
were made of total yield, yield of U.S. No. 1 tubers and
number of stems produced per plot.
Total yields of the Russet Burbank variety were...
Field and growth chamber studies were conducted to ascertain
the effects of some environmental factors on the persistence of viable
buried seed of Agrostis tenuis, Avena fatua, Lolium multiflorum,
Lolium perenne, and Poa annua.
Through the use of a population model, specific effects of environment
on parameters of viability and...
Experiments were conducted under controlled environments to
investigate the influence of nutrient supply and panicle removal on
tiller and panicle production in orchardgrass. Propagules of two
clones, MID-5 (Clone 0), from the synthetic variety Pennlate, and
Clone B, a locally adapted clone, were utilized for these studies.
Tiller production was...
Controlled environment chamber and laboratory studies were
carried out to evaluate selectivity and chemodynamics of bromoxynil
(3,5-dibromo-4-hydroxybenzonitrile) in winter wheat (Triticum
aestivum L.) 'Nugaines', a tolerant species, and coast fiddleneck
(Amsinckia intermedia Fisch. & Mey), a susceptible species.
A comparison of ED₅₀ values, based upon reduction of whole
plant growth,...
Experiments were conducted to determine the effect of environment
and several plant growth regulators on the physiology, quality,
and agronomic performance of snap beans (Phaseolus vulgaris L. )
and spring wheat (Triticum aestivum L. ). The potassium salts of
naphthenic acid and cyclohexanecarboxylic acid, received particular
attention.
Application of potassium...
The effects of post-harvest burning of red fescue on production of shoots, roots and inflorescences as well as seed yield were determined at the clonal and community level by comparing fescue plants in a burned area with those in unburned plots within the same field. Studies were also conducted to...
Experiments were conducted to determine the effects of
certain plant regulatory chemicals on seed production of
alfalfa (Medicago sativa L.). Two plant regulators, SADH
(succinic acid 2,2-dimethylhydrazide) and TIBA (2,3,5-
triiodobenzoic acid), received particular attention.
Replicated field tests of the plant regulators were
carried out on the cultivar 'Talent' in...