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,...
Studies were conducted on the causes of low germination of
monogerm sugarbeet seed grown in western Oregon. Emphasis was
placed on the identification and measurement of endogenous inhibitors
as related to the germination and vigor. Both qualitative and quantitative
analytical methods were applied to examine the organic substances
in the...
Seed of Cougar and Newport Kentucky bluegrass (Poa pratensis L.)
was harvested at Pullman and Spokane at several stages of maturity.
Variations in seed attributes resulting from environmental and maturity
effects were evaluated through germination tests, tetrazolium staining,
seed moisture and seed weight determinations. Seedling vigor was
determined by .speed...
The effect of clipping and supplemental nitrogen application on
seed production of Linn perennial ryegrass and Merion Kentucky bluegrass
was studied. Clipping and nitrogen treatments did not significantly
affect the seed yield of Linn perennial ryegrass during the 1967
growing season. The seed yield of Merion Kentucky bluegrass was
significantly...
Field, growth chamber, and greenhouse studies were carried
out to evaluate factors that cause low seed set in Dactylis Glomerata
L. The variety, 'Latar', and the parental clones of the variety,
'Pennlate', were studied in detail.
Floral anatomy investigations indicated that 98 percent of
Dactylis flowers opened at Corvallis in...