Abstract
Summary Three experiments were carried out in which nitrogen was applied to spring barley (cv. Midas) either all in the seed bed or as a divided dressing with 10 or 25 kg/ha in the seed bed and 50 or 60 kg applied at emergence or 10, 20, 30, 40, 50, 60 or 70 days after emergence. Applying part of the nitrogen as a top dressing up to 30 days after emergence and 50 days after emergence had no significant effects on the grain and straw yields respectively, compared with applying all the nitrogen in the seed bed. Grain yields were progressively reduced with top dressings from 40 days after emergence (first node stage) onwards. Applications at 60 or 70 days did not give more grain yield than the no-nitrogen control, but gave straw yields which were intermediate between the no-nitrogen and seed-bed nitrogen treatments. Top dressing at 40 days after emergence stimulated tiller survival but did not improve grain yield because there were fewer grains per ear. Thousand-grain weights were lowest with top dressings at 50 days after emergence and grain nitrogen increased progressively with delay in top dressings from 30 days after emergence onwards.
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Claims 10
Claim · model-written summary
Top dressing through 30 days after emergence did not significantly alter grain yield relative to all nitrogen in the seed bed.
- Taxon
- spring barley
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Hordeum vulgaree1 - Material
- Midase1
- Treatment
- top dressing up to 30 days after emergencee0
- Outcome
- graine0
- Comparator
- applying all the nitrogen in the seed bede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Applying part of the nitrogen as a top dressing up to 30 days after emergence and 50 days after emergence had no significant effects on the grain and straw yields respectively, compared with applying all the nitrogen in the seed bed”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Top dressing through 50 days after emergence did not significantly alter straw yield relative to all nitrogen in the seed bed.
- Taxon
- spring barleyHordeum vulgaree1
- Material
- Midase1
- Treatment
- 50 days after emergencee0
- Outcome
- straw yieldse0
- Comparator
- applying all the nitrogen in the seed bede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying part of the nitrogen as a top dressing up to 30 days after emergence and 50 days after emergence had no significant effects on the grain and straw yields respectively, compared with applying all the nitrogen in the seed bed”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Grain yield progressively fell when top dressings were delayed from 40 days after emergence.
- Taxon
- spring barleyHordeum vulgaree1
- Organ / stage
- first node stagee0
- Treatment
- top dressings from 40 days after emergencee0
- Outcome
- Grain yieldse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were progressively reduced with top dressings from 40 days after emergence (first node stage) onwards”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Top dressings at 60 or 70 days gave no more grain yield than no nitrogen.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- Applications at 60 or 70 dayse0
- Outcome
- grain yielde0
- Direction
- did not give moree0
- Comparator
- no-nitrogen controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications at 60 or 70 days did not give more grain yield than the no-nitrogen control”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Top dressings at 60 or 70 days produced straw yield between no-nitrogen and seed-bed nitrogen treatments.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- Applications at 60 or 70 dayse0
- Outcome
- straw yieldse0
- Direction
- intermediatee0
- Comparator
- no-nitrogen and seed-bed nitrogen treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications at 60 or 70 days did not give more grain yield than the no-nitrogen control, but gave straw yields which were intermediate between the no-nitrogen and seed-bed nitrogen treatments”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Top dressing at 40 days increased tiller survival.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- Top dressing at 40 days after emergencee0
- Outcome
- tiller survivale0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top dressing at 40 days after emergence stimulated tiller survival”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Top dressing at 40 days did not improve grain yield.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- Top dressing at 40 days after emergencee0
- Outcome
- grain yielde0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top dressing at 40 days after emergence stimulated tiller survival but did not improve grain yield”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Top dressing at 40 days resulted in fewer grains per ear.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- Top dressing at 40 days after emergencee0
- Outcome
- grains per eare0
- Direction
- fewere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top dressing at 40 days after emergence stimulated tiller survival but did not improve grain yield because there were fewer grains per ear”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Thousand-grain weight was lowest with top dressings at 50 days.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- top dressings at 50 days after emergencee0
- Outcome
- Thousand-grain weightse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thousand-grain weights were lowest with top dressings at 50 days after emergence”
e1“spring barley (cv. Midas)”
Claim · model-written summary
Grain nitrogen increased as top dressing was delayed beyond 30 days.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- top dressingse0
- Outcome
- grain nitrogene0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain nitrogen increased progressively with delay in top dressings from 30 days after emergence onwards”
e1“spring barley (cv. Midas)”
The same questions in other papers
fertilization · yield · Hordeum vulgare (barley)Positive and negative results
472 papers in the same direction as this paper · 66 in the opposite direction · 11 reporting no difference from an alternative
- positive
- no effect
- negative
546 papers more in this group
See all 550 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.