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...
This study was undertaken to obtain information on the quality of grass seed when windrowed at the high moisture levels necessary for obtaining maximum yields. A secondary goal was to monitor moisture and temperature fluctuations in the windrow and to relate their effects to development and deterioration of the seed....
The objective of this study was to identify visual or easily
measured morphological characters associated with seed yield or its
components in a spaced-plant nursery of tall fescue (Festuca arundinacea
Schreb.). In 1977, 26 plant characteristics were observed on 210 plants
from seven different geographic regions of origin. Each origin...
Studies were conducted to determine the uniformity of three
commercial seed lots of ryegrass (Lolium spp.) and the effects of lot
size on lot uniformity. Individual bag-samples were taken from each
seed lot. Factors considered were percentage purity, annual ryegrass,
perennial ryegrass, weed, other crop, inert matter, and germination.
Number...
Paraquat (1,11-dimethy1-4,4'-bipyridinium ion) and glyphosate [N (phosphonomethyl)glycine] are herbicides utilized for chemical seedbed preparation in the establishment of grass and legume seed crops. When these herbicides are applied after seeding the crop, seeds which are not protected by a layer of soil could be exposed to the herbicide. Effects of...
In conventional cropping systems in the Willamette Valley, slow
establishing grass species, such as Kentucky bluegrass (Poapratensis L.) are planted in the spring and seed is not harvested
until the following year. Due to increasing annual production
costs, it is necessary to generate a cash return from each field
each...
Italian ryegrass growth and production from
positionally selective applications and sublethal rates of a
nonselective herbicide were compared to growth and
production when treated with diuron applied preemergence as
a broadcast treatment and safened by activated carbon
applied over the crop row. In the positionally selective
treatments, herbicide spray was...
Grass seed production in Oregon's Willamette Valley traditionally relied on open field burning for straw residue disposal and nutrient recycling. Changes in residue management from open field burning to methods that remove straw coincided with rapidly declining K soil test values. A survey of grass seed fields showed that many...