Abstract
SUMMARY In 1964 spring wheat and kale each were grown with 0·0, 0·5, 1·0 or 1·5 cwt N/acre. In 1965 barley measured residues. Without N and with 0·33 cwt N/acre the barley yielded more after wheat than after kale, but, with 0·66 or 1·0 cwt N/acre, more after kale. The residues of the N given for the wheat and kale increased barley yields. In 1965 spring wheat, kale and Italian ryegrass each were grown with 0·0, 1·0 or 2·0 cwt N/acre. In 1966 and 1967 barley tested 0·0, 0·5 or 1·0 ewt N/acre in all combinations with previous treatments. In 1966 yields were largest after kale and smallest after ryegrass. Differences from the three crops were diminished by the N applied for them, and these N residues consistently increased yields. N given to the barley greatly increased yields, most after ryegrass and least after kale, and equally with or without fertilizer residues, but did not change differences from the crops. In 1967 yields were largest after ryegrass, but no larger after kale than after wheat. The residues of the N given for ryegrass increased yields. N given to the barley increased yields greatly, but most after kale. In 1966 spring wheat, kale and Italian ryegrass each were grown without N and with 1·0 or 2·0 cwt N/acre, but on a more fertile field. In 1967 and 1968 barley tested 0·0, 0·5 or 1·0 cwt N/acre in all combinations with previous treatments. In 1967 yields were largest after kale and smallest after ryegrass. The residues of the N given in 1966 consistently increased yields when the barley was not given N, and after ryegrass when it was; but they decreased yields when N was given after wheat and kale. The barley needed 1·0 cwt N/acre after ryegrass, but less than 0·5 cwt N/acre after wheat or kale. In 1968 barley yielded most when it was not given N and then the largest yields were after ryegrass. The N given for the barley greatly decreased yields and the N residues decreased them further. The amounts of N removed in the barley grain were well correlated with yields.
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Claims 19
Claim · model-written summary
In 1965 barley yielded more after wheat than kale at low N, but more after kale at higher N.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- wheate0
- Outcome
- yieldede0
- Direction
- moree0
- Qualifier
- Without N and with 0·33 cwt N/acree0
- Comparator
- kalee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Without N and with 0·33 cwt N/acre the barley yielded more after wheat than after kale, but, with 0·66 or 1·0 cwt N/acre, more after kale.”
Claim · model-written summary
At higher N rates, 1965 barley yielded more after kale than wheat.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- kalee0
- Outcome
- yieldede0
- Direction
- moree0
- Qualifier
- 0·66 or 1·0 cwt N/acree0
- Comparator
- wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Without N and with 0·33 cwt N/acre the barley yielded more after wheat than after kale, but, with 0·66 or 1·0 cwt N/acre, more after kale.”
Claim · model-written summary
Nitrogen residues from wheat and kale raised 1965 barley yields.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- residues of the Ne0
- Outcome
- barley yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The residues of the N given for the wheat and kale increased barley yields.”
Claim · model-written summary
In 1966 barley yields were highest after kale and lowest after ryegrass.
Not reportedTaxon
Verbatim
e0“In 1966 yields were largest after kale and smallest after ryegrass.”
Claim · model-written summary
Prior crop yield differences diminished with N applied to those crops.
Not reportedTaxonComparator
Verbatim
e0“Differences from the three crops were diminished by the N applied for them, and these N residues consistently increased yields.”
Claim · model-written summary
Prior crop N residues consistently increased 1966 barley yield.
Not reportedTaxonComparator
Verbatim
e0“Differences from the three crops were diminished by the N applied for them, and these N residues consistently increased yields.”
Claim · model-written summary
N applied to barley greatly increased 1966 yield, most after ryegrass and least after kale.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- N given to the barleye0
- Outcome
- yieldse0
- Direction
- increasede0
- Qualifier
- most after ryegrass and least after kalee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N given to the barley greatly increased yields, most after ryegrass and least after kale, and equally with or without fertilizer residues, but did not change differences from the crops.”
Claim · model-written summary
Barley N did not change 1966 differences among prior crops.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- N given to the barleye0
- Outcome
- differences from the cropse0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N given to the barley greatly increased yields, most after ryegrass and least after kale, and equally with or without fertilizer residues, but did not change differences from the crops.”
Claim · model-written summary
In 1967 barley yields were highest after ryegrass and no higher after kale than wheat.
Not reportedTaxon
Verbatim
e0“In 1967 yields were largest after ryegrass, but no larger after kale than after wheat.”
Claim · model-written summary
Ryegrass N residues increased 1967 barley yields.
Not reportedTaxonComparator
Verbatim
e0“The residues of the N given for ryegrass increased yields.”
Claim · model-written summary
N applied to barley greatly increased 1967 yields, most after kale.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- N given to the barleye0
- Outcome
- yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N given to the barley increased yields greatly, but most after kale.”
Claim · model-written summary
On the more fertile field, 1967 barley yield was highest after kale and lowest after ryegrass.
Not reportedTaxon
Verbatim
e0“In 1967 yields were largest after kale and smallest after ryegrass.”
Claim · model-written summary
On the more fertile field, 1966 N residues increased barley yields without barley N, and after ryegrass with barley N.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- residues of the N given in 1966e0
- Outcome
- yieldse0
- Direction
- increasede0
- Qualifier
- when the barley was not given Ne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The residues of the N given in 1966 consistently increased yields when the barley was not given N, and after ryegrass when it was; but they decreased yields when N was given after wheat and kale.”
Claim · model-written summary
On the more fertile field, prior N residues decreased barley yield when barley received N after wheat and kale.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- residues of the N given in 1966e0
- Outcome
- yieldse0
- Direction
- decreasede0
- Qualifier
- when N was given after wheat and kalee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The residues of the N given in 1966 consistently increased yields when the barley was not given N, and after ryegrass when it was; but they decreased yields when N was given after wheat and kale.”
Claim · model-written summary
Barley needed 1·0 cwt N/acre after ryegrass but less than 0·5 after wheat or kale.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- 1·0 cwt N/acre after ryegrasse0
- Qualifier
- less than 0·5 cwt N/acre after wheat or kalee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The barley needed 1·0 cwt N/acre after ryegrass, but less than 0·5 cwt N/acre after wheat or kale.”
Claim · model-written summary
In 1968 barley yielded most without N, with highest yields after ryegrass.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- not given Ne0
- Outcome
- yieldede0
- Direction
- moste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1968 barley yielded most when it was not given N and then the largest yields were after ryegrass.”
Claim · model-written summary
N given to barley decreased 1968 yields.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- N given for the barleye0
- Outcome
- yieldse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N given for the barley greatly decreased yields and the N residues decreased them further.”
Claim · model-written summary
Prior N residues further decreased 1968 barley yields.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- N residuese0
- Outcome
- yieldse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N given for the barley greatly decreased yields and the N residues decreased them further.”
Claim · model-written summary
N removed in barley grain correlated well with yield.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- barley graine0
- Outcome
- yieldse0
- Qualifier
- well correlatede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amounts of N removed in the barley grain were well correlated with yields.”
The same questions in other papers
Triticum aestivum · yield · Hordeum vulgare (barley)Positive and negative results
9 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- no effect
11 papers more in this group
See all 15 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.