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
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.
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
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
Seed moisture is a primary factor influencing seed quality during harvesting, storage, and marketing of grass seed. However, the Association of Official Seed Analysts' Rules for Testing Seeds do not contain methods for moisture testing. The oven methods in use by seed testing laboratories in the U.S. are diverse and...
Published January 1958. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
To increase efficiency of seed production, it is important to
understand the effects of nitrogen (N) fertilizer rate and time of
application. In particular, the effects on floret fertility should
be examined since only a small proportion of florets actually produce harvestable seed. For these reasons, experiments were conducted in...