Abstract
SUMMARY A condition known as ‘scorch” with symptoms similar to copper deficiency often occurs in dry weather on cereals grown on a sandy soil (at Woburn) with an unstable structure. Plants with symptoms contained more sulphur than normal and sulphur/ copper interactions were suspected. Sulphur fertilizers tested in two pot experiments with this soil did not induce copper deficienciesbut increased grain and straw yields of spring wheat especially at higher nitrogen rates. Yields were increased when the mature grain contained less than 0.12% S and the straw less than 0.5% Sin the dry matter. Sulphur concentrations were larger in plants grown in the greenhouse rather than in growth cabinets and in plants grown in oven-dried rather than air-dried soil. Soil-applied copper sulphate slightly increased grain yields in pots but in one experiment there were no corresponding increases in copper contents of the crop. In a field experiment where ‘scorch’ symptoms occurred in 1972, copper oxychloride sprays increased copper concentrations but not yields of the grain. These results suggest that copper deficiency is unlikely to be a primary cause of ‘scorch’ symptoms.
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Claims 11
Claim · model-written summary
Symptomatic cereals contained more sulphur than normal plants.
Not reportedTaxon
Verbatim
e0“Plants with symptoms contained more sulphur than normal”
Claim · model-written summary
Sulphur fertilizers did not induce copper deficiencies.
- Taxon
- spring wheat
Triticum aestivume0 - Treatment
- Sulphur fertilizerse0
- Outcome
- copper deficienciese0
- Direction
- did not inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sulphur fertilizers tested in two pot experiments with this soil did not induce copper deficienciesbut increased grain and straw yields of spring wheat”
Claim · model-written summary
Sulphur fertilizer increased wheat grain and straw yields, especially at higher nitrogen rates.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Sulphur fertilizerse0
- Outcome
- grain and straw yieldse0
- Direction
- increasede0
- Qualifier
- higher nitrogen ratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sulphur fertilizers tested in two pot experiments with this soil did not induce copper deficienciesbut increased grain and straw yields of spring wheat especially at higher nitrogen rates”
Claim · model-written summary
Yield increases occurred below grain and straw sulphur thresholds.
- Taxon
- spring wheatTriticum aestivumt0
- Organ / stage
- mature graine0
- Outcome
- Yieldse0
- Direction
- increasede0
- Qualifier
- less than 0.12% S and the straw less than 0.5% Sin the dry mattere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields were increased when the mature grain contained less than 0.12% S and the straw less than 0.5% Sin the dry matter”
t0“spring wheat”
Claim · model-written summary
Plant sulphur concentrations were larger in greenhouse than growth cabinet conditions.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- Sulphur concentrationse0
- Direction
- largere0
- Comparator
- growth cabinetse0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sulphur concentrations were larger in plants grown in the greenhouse rather than in growth cabinets”
t0“spring wheat”
Claim · model-written summary
Plant sulphur concentrations were larger in oven-dried than air-dried soil.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- oven-driede0
- Outcome
- Sulphur concentrationse0
- Direction
- largere0
- Comparator
- air-dried soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sulphur concentrations were larger in plants grown in the greenhouse rather than in growth cabinets and in plants grown in oven-dried rather than air-dried soil.”
t0“spring wheat”
Claim · model-written summary
Soil-applied copper sulphate slightly increased pot grain yield.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- Soil-applied copper sulphatee0
- Outcome
- grain yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil-applied copper sulphate slightly increased grain yields in pots”
t0“spring wheat”
Claim · model-written summary
Copper sulphate did not increase crop copper content in one pot experiment.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- copper contents of the crope0
- Direction
- no corresponding increasese0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in one experiment there were no corresponding increases in copper contents of the crop”
t0“spring wheat”
Claim · model-written summary
Copper oxychloride spray increased grain copper concentration in a field experiment.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- copper oxychloride sprayse0
- Outcome
- copper concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“copper oxychloride sprays increased copper concentrations but not yields of the grain”
t0“spring wheat”
Claim · model-written summary
Copper oxychloride spray did not increase field grain yield.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- copper oxychloride sprayse0
- Outcome
- yields of the graine0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“copper oxychloride sprays increased copper concentrations but not yields of the grain”
t0“spring wheat”
Claim · model-written summary
Copper deficiency was judged unlikely to be the primary cause of scorch.
- Taxon
- spring wheatTriticum aestivumt0
- Compound
- coppere0
- Outcome
- ‘scorch’ symptomse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“copper deficiency is unlikely to be a primary cause of ‘scorch’ symptoms”
t0“spring wheat”
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See all 959 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.