Abstract
1. Cereal plant density affects yield and growth parameters of fundamental importance. An experiment is described in which growth and development, and yield and yield components of barley grown over a wide range of density were examined. 2. Four varieties of barley—Proctor, Plumage-Archer, Domen, and Moore—were grown at densities approximately equivalent to 35, 70, 140 and 280 lb/acre. Density was found not to affect seedling establishment or plant survival, but there was a variety effect on seedling establishment. 3. Varietal differences were seen in maximum tiller number, and the percentage of tillers surviving to form ears. These differences were most marked between the six-row variety and two-row varieties. The effect of increasing density was to increase the maximum tiller number, but this was followed by different rates of tiller death until early June, after which there was no further compensation for tiller number. Ear emergence and ear number were affected both by variety and density.
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Claims 8
Claim · model-written summary
Density did not affect barley seedling establishment or survival.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- Densitye0
- Outcome
- seedling establishment or plant survivale0
- Direction
- not to affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Density was found not to affect seedling establishment or plant survival”
t0“barley”
Claim · model-written summary
Barley varieties differed in seedling establishment.
- Taxon
- barleyHordeum vulgaret0
- Material
- varietye0
- Outcome
- seedling establishmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a variety effect on seedling establishment”
t0“barley”
Claim · model-written summary
Barley varieties differed in maximum tiller number and tiller survival to ears.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- maximum tiller number, and the percentage of tillers surviving to form earse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Varietal differences were seen in maximum tiller number, and the percentage of tillers surviving to form ears”
t0“barley”
Claim · model-written summary
Differences in tillering were greatest between six-row and two-row varieties.
- Taxon
- barleyHordeum vulgaret0
- Material
- six-row varietye0
- Outcome
- differencese0
- Comparator
- two-row varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These differences were most marked between the six-row variety and two-row varieties”
t0“barley”
Claim · model-written summary
Increasing density increased maximum tiller number.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- increasing densitye0
- Outcome
- maximum tiller numbere0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of increasing density was to increase the maximum tiller number”
t0“barley”
Claim · model-written summary
Tiller death rates varied after the density-related increase until early June.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- different rates of tiller deathe0
- Qualifier
- until early Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this was followed by different rates of tiller death until early June”
t0“barley”
Claim · model-written summary
No further compensation for tiller number occurred after early June.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- no further compensation for tiller numbere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after which there was no further compensation for tiller number”
t0“barley”
Claim · model-written summary
Both variety and density affected ear emergence and ear number.
- Taxon
- barleyHordeum vulgaret0
- Material
- varietye0
- Treatment
- densitye0
- Outcome
- Ear emergence and ear numbere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ear emergence and ear number were affected both by variety and density”
t0“barley”
The same questions in other papers
density · growth · Hordeum vulgare (barley)Positive and negative results
8 papers in the same direction as this paper · 16 in the opposite direction
- positive
- positive
- positive
21 papers more in this group
See all 25 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.