Abstract
SUMMARY A sigmoid curve for response to superphosphate has been demonstrated in field experiments in a Buganda red clay loam. There was evidence that the curve was abnormal; with small dressings of triple superphosphate yield of cotton and beans, and their phosphorus uptake, were decreased, but these characters were increased with larger dressings. Heavy dressings, from 4 to 16 cwt triple superphosphate, increased yield of these crops. Similar effects were observed with maize during growth and maturity was advanced, but final yield of grain was not affected by applied phosphate. The suggestion is made that in a long growing period the maize was able to absorb adequate phosphorus, even though the phosphate intensity in the soil was low, to achieve its potential yield.
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Claims 12
Claim · model-written summary
In field experiments on a Buganda red clay loam, an observed sigmoid response curve to superphosphate was demonstrated.
Not reportedTaxon
Verbatim
e0“A sigmoid curve for response to superphosphate has been demonstrated in field experiments in a Buganda red clay loam”
Claim · model-written summary
Small dressings of triple superphosphate decreased cotton yield.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- small dressings of triple superphosphatee0
- Outcome
- yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with small dressings of triple superphosphate yield of cotton and beans, and their phosphorus uptake, were decreased, but these characters were increased with larger dressings”
Claim · model-written summary
Small dressings of triple superphosphate decreased bean yield.
Not reportedComparator
Verbatim
e0“with small dressings of triple superphosphate yield of cotton and beans, and their phosphorus uptake, were decreased, but these characters were increased with larger dressings”
Claim · model-written summary
Small dressings of triple superphosphate decreased cotton phosphorus uptake.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- small dressings of triple superphosphatee0
- Outcome
- phosphorus uptakee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with small dressings of triple superphosphate yield of cotton and beans, and their phosphorus uptake, were decreased, but these characters were increased with larger dressings”
Claim · model-written summary
Small dressings of triple superphosphate decreased bean phosphorus uptake.
- Taxon
- beanse0
- Treatment
- small dressings of triple superphosphatee0
- Outcome
- phosphorus uptakee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“with small dressings of triple superphosphate yield of cotton and beans, and their phosphorus uptake, were decreased, but these characters were increased with larger dressings”
Claim · model-written summary
Larger dressings of triple superphosphate increased cotton phosphorus uptake.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- larger dressingse0
- Outcome
- phosphorus uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with small dressings of triple superphosphate yield of cotton and beans, and their phosphorus uptake, were decreased, but these characters were increased with larger dressings”
Claim · model-written summary
Larger dressings of triple superphosphate increased bean phosphorus uptake.
Not reportedComparator
Verbatim
e0“with small dressings of triple superphosphate yield of cotton and beans, and their phosphorus uptake, were decreased, but these characters were increased with larger dressings”
Claim · model-written summary
Heavy dressings of 4 to 16 cwt triple superphosphate increased cotton yield.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Heavy dressings, from 4 to 16 cwt triple superphosphatee1
- Outcome
- yielde1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of cotton and beans”
e1“Heavy dressings, from 4 to 16 cwt triple superphosphate, increased yield of these crops”
Claim · model-written summary
Heavy dressings of 4 to 16 cwt triple superphosphate increased bean yield.
- Taxon
- beanse0
- Treatment
- Heavy dressings, from 4 to 16 cwt triple superphosphatee1
- Outcome
- yielde1
- Direction
- increasede1
Not reportedComparator
Verbatim
e0“yield of cotton and beans”
e1“Heavy dressings, from 4 to 16 cwt triple superphosphate, increased yield of these crops”
Claim · model-written summary
Applied phosphate advanced maize maturity.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar effects were observed with maize during growth and maturity was advanced, but final yield of grain was not affected by applied phosphate”
Claim · model-written summary
Final grain yield of maize was not affected by applied phosphate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar effects were observed with maize during growth and maturity was advanced, but final yield of grain was not affected by applied phosphate”
Claim · model-written summary
The authors suggest that in a long growing period maize could absorb adequate phosphorus despite low soil phosphate intensity to reach its potential yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in a long growing period the maize was able to absorb adequate phosphorus, even though the phosphate intensity in the soil was low, to achieve its potential yield”
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See all 627 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.