Abstract
1. Seed production stands of S 37 cocksfoot were obtained with varying plant densities by utilizing two drill widths, removing sections of drill, or over-sowing drilled material. All density treatments were operative at two levels of N, 87 or 174 lb. N per acre per annum. 2. Tillers in selected quadrats were labelled at monthly intervals during autumn and/or winter for 3 years. Performances of tiller populations were assessed from these quadrats. 3. Seed yields were increased in many cases by reducing plant density from a continuous drill pattern. Increased plant density reduced yields. With plant communities on a 1 ft. square arrangement at the high level of nitrogen, an increase of 33%, or 243 lb. seed, per year over a 3-year period was obtained compared with continuous rows at any level of N. The yield of gapped stands increased over the 3-year period, whilst the yields of continuous rows dropped in the final year. 4. Nitrogen significantly increased the yield of cocksfoot, except in the third year, by increasing the weight of seed per ear. 5. Tiller numbers per quadrat increased in most treatments over the course of the experiment, both within years and from year to year; seasonal peaks of tillering were apparent. The effect of N on tiller numbers differed each year, presumably due to the state of the populations when the N was applied. 6. Higher tiller numbers per plant were obtained with lower plant numbers per unit area. Percentage fertility of tillers was generally higher with lower plant densities, and lower tiller numbers per plant, other factors being equal. The only significant effect of N on fertility was to decrease it in the third year.
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Claims 13
Claim · model-written summary
Reducing plant density from a continuous drill pattern increased seed yields in many cases.
- Taxon
- cocksfoot
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Dactylis glomeratat0 - Treatment
- reducing plant densitye1
- Outcome
- Seed yieldse1
- Direction
- increasede1
- Qualifier
- in many casese1
- Comparator
- continuous drill patterne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e1“Seed yields were increased in many cases by reducing plant density from a continuous drill pattern”
Claim · model-written summary
Increased plant density reduced yields.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- Increased plant densitye2
- Outcome
- yieldse2
- Direction
- reducede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e2“Increased plant density reduced yields”
Claim · model-written summary
A 1 ft. square plant arrangement at the high nitrogen level raised seed yield by 33% over continuous rows.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- 1 ft. square arrangemente3
- Outcome
- seede3
- Direction
- increasee3
- Value
- 33%e3
- Qualifier
- at the high level of nitrogene3
- Comparator
- continuous rowse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e3“With plant communities on a 1 ft. square arrangement at the high level of nitrogen, an increase of 33%, or 243 lb. seed, per year over a 3-year period was obtained compared with continuous rows at any level of N”
Claim · model-written summary
Seed yield of gapped stands increased over the 3-year period.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- gapped standse4
- Outcome
- yielde4
- Direction
- increasede4
- Qualifier
- over the 3-year periode4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e4“The yield of gapped stands increased over the 3-year period”
Claim · model-written summary
Yields of continuous rows dropped in the final year.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- continuous rowse5
- Outcome
- yieldse5
- Direction
- droppede5
- Qualifier
- in the final yeare5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e5“whilst the yields of continuous rows dropped in the final year”
Claim · model-written summary
Nitrogen significantly increased cocksfoot yield, except in the third year.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- Nitrogene6
- Outcome
- yielde6
- Direction
- increasede6
- Qualifier
- except in the third yeare6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e6“Nitrogen significantly increased the yield of cocksfoot, except in the third year, by increasing the weight of seed per ear”
Claim · model-written summary
Nitrogen raised cocksfoot yield by increasing the weight of seed per ear.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- Nitrogene6
- Outcome
- yielde6
- Qualifier
- by increasing the weight of seed per eare6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e6“Nitrogen significantly increased the yield of cocksfoot, except in the third year, by increasing the weight of seed per ear”
Claim · model-written summary
Tiller numbers per quadrat increased in most treatments over the experiment.
- Taxon
- cocksfootDactylis glomeratat0
- Outcome
- Tiller numbers per quadrate7
- Direction
- increasede7
- Qualifier
- in most treatmentse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e7“Tiller numbers per quadrat increased in most treatments over the course of the experiment”
Claim · model-written summary
Seasonal peaks of tillering were apparent.
- Taxon
- cocksfootDactylis glomeratat0
- Outcome
- seasonal peaks of tilleringe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e7“seasonal peaks of tillering were apparent”
Claim · model-written summary
The effect of nitrogen on tiller numbers differed each year.
- Taxon
- cocksfootDactylis glomeratat0
- Outcome
- effect of N on tiller numberse7
- Qualifier
- differed each yeare7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e7“The effect of N on tiller numbers differed each year”
Claim · model-written summary
Higher tiller numbers per plant were obtained with lower plant numbers per unit area.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- lower plant numbers per unit areae7
- Outcome
- tiller numbers per plante7
- Direction
- Highere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e7“Higher tiller numbers per plant were obtained with lower plant numbers per unit area”
Claim · model-written summary
Percentage fertility of tillers was generally higher with lower plant densities.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- lower plant densitiese7
- Outcome
- Percentage fertility of tillerse7
- Direction
- highere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e7“Percentage fertility of tillers was generally higher with lower plant densities”
Claim · model-written summary
Nitrogen significantly decreased tiller fertility in the third year.
- Taxon
- cocksfootDactylis glomeratat0
- Treatment
- Ne7
- Outcome
- fertilitye7
- Direction
- decreasee7
- Qualifier
- in the third yeare7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“S 37 cocksfoot (Dactylis glomerata L.)”
e7“The only significant effect of N on fertility was to decrease it in the third year”
The same questions in other papers
density · yield · Dactylis glomerata (cocksfoot)Results agree
1 paper in the same direction as this paper
- positive
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.