Abstract
SUMMARY The aim of the experiments reported here was to investigate the possibility of minimizing yield losses due to late sowing by increasing leaf area and radiation interception during the pre-flowering period. The use of large seed did increase leaf area, radiation interception and crop weight at flowering. Normally this would be expected to lead to increased yield of late sowings, but hot, dry conditions severely affected all crops during seed growth. Applying fertilizer nitrogen in the seed bed boosted pre-flowering growth of early but not late sowings, probably because low temperatures prevented a response in the latter. Increasing plant population density did improve leaf cover and radiation interception until just before flowering, but leaf canopies in late-sown, low density crops were then able to expand more and function for longer owing to less shading by flowers and pods. Seed retention was improved and, even with as few as 8 plants/m 3 in 1973–4, a worthwhile yield was still obtained.
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Claims 8
Claim · model-written summary
Large seed increased leaf area, radiation interception and crop weight at flowering
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- The use of large seede0
- Outcome
- leaf area, radiation interception and crop weight at floweringe0
- Direction
- did increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e0“The use of large seed did increase leaf area, radiation interception and crop weight at flowering”
Claim · model-written summary
Hot, dry conditions severely affected all crops during seed growth
- Taxon
- Brassica napusBrassica napust0
- Treatment
- hot, dry conditionse1
- Outcome
- all cropse1
- Qualifier
- severely affectede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e1“hot, dry conditions severely affected all crops during seed growth”
Claim · model-written summary
Seed-bed nitrogen boosted pre-flowering growth of early sowings
- Taxon
- Brassica napusBrassica napust0
- Treatment
- Applying fertilizer nitrogen in the seed bede2
- Outcome
- pre-flowering growthe2
- Direction
- boostede2
- Qualifier
- early but not late sowingse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e2“Applying fertilizer nitrogen in the seed bed boosted pre-flowering growth of early but not late sowings”
Claim · model-written summary
Seed-bed nitrogen did not boost pre-flowering growth of late sowings
- Taxon
- Brassica napusBrassica napust0
- Treatment
- Applying fertilizer nitrogen in the seed bede2
- Outcome
- pre-flowering growthe2
- Qualifier
- late sowingse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e2“Applying fertilizer nitrogen in the seed bed boosted pre-flowering growth of early but not late sowings”
Claim · model-written summary
Increasing plant population density improved leaf cover and radiation interception until just before flowering
- Taxon
- Brassica napusBrassica napust0
- Treatment
- Increasing plant population densitye3
- Outcome
- leaf cover and radiation interceptione3
- Direction
- improvee3
- Qualifier
- until just before floweringe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e3“Increasing plant population density did improve leaf cover and radiation interception until just before flowering”
Claim · model-written summary
Low-density late-sown canopies functioned for longer owing to less shading by flowers and pods
- Taxon
- Brassica napusBrassica napust0
- Outcome
- function for longere4
- Qualifier
- less shading by flowers and podse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e4“leaf canopies in late-sown, low density crops were then able to expand more and function for longer owing to less shading by flowers and pods”
Claim · model-written summary
Seed retention improved in low-density crops
- Taxon
- Brassica napusBrassica napust0
- Outcome
- Seed retentione5
- Direction
- improvede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e5“Seed retention was improved and, even with as few as 8 plants/m 3 in 1973–4, a worthwhile yield was still obtained”
Claim · model-written summary
A worthwhile yield was still obtained at as few as 8 plants per m3
- Taxon
- Brassica napusBrassica napust0
- Treatment
- as few as 8 plants/m 3e5
- Outcome
- a worthwhile yielde5
- Qualifier
- still obtainede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“winter oil-seed rape (Brassica napus)”
e5“Seed retention was improved and, even with as few as 8 plants/m 3 in 1973–4, a worthwhile yield was still obtained”
The same questions in other papers
nitrogen · growth · Brassica napus (oilseed rape)Positive and negative results
64 papers in the same direction as this paper · 17 in the opposite direction
- positive
- negative
- no effect
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See all 82 papers →fertilization · growth · Brassica napus (oilseed rape)Positive and negative results
88 papers in the same direction as this paper · 17 in the opposite direction
- negative
- positive
- negative
102 papers more in this group
See all 106 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.