Abstract
Effects of N, P, K and Ca applied separately and in combinations on growth and yields of several crops grown in different yr during 1959-62 on upland lateritic soils (pH 5.1-5.7) in West Bengal are described. The 3-yr average fresh matter yields of Crotalaria juncea grown for green manuring were 1.97, 1.43, 4.75, 6.18 and 6.71 t/ha with Ca, N, P, P + Ca and N + P + Ca, resp., compared with 1.27 t without NPCa. Application of 40 kg N or 20 kg P2O5/ha or NP to rice in 1960 gave paddy yields of 0.98, 0.8 and 1.79 t/ha, resp., compared with 0.68 t without NP. Grain yields of 0.28 t/ha without Ca and 0.43 t with Ca in Paspalum scrobiculatum given no NP were increased to 0.96 and 1.12 t, resp., with NP. Seed yields of 363 kg/ha without Ca and 497 kg with Ca in Hibiscus cannabinus given no NP were increased to 645 and 664 kg, resp., with NP; fibre yields of 517 kg/ha without NPK were increased to 1.06 t with 18 kg N + 36 kg P2O5 + 27 kg K2O/ha. Seed yields of 42 kg/ha without Ca and 49 kg with Ca in Dolichos biflorus [Macrotyloma uniflorum] given no NP were increased to 89 and 88 kg, resp., with N, 556 and 897 kg with P and 1.05 and 1.43 t with N + P. Seed yields of 19 kg/ha without Ca and 36 kg with Ca in niger [Guizotia abyssinica] given no NPK were increased to 150 and 466 kg, resp., with NPK
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Claims 20
Claim · model-written summary
Crotalaria fresh matter yield with Ca was 1.97 t/ha.
- Taxon
- Crotalaria juncea
Crotalaria junceae0 - Treatment
- Cae0
- Outcome
- fresh matter yieldse0
- Value
- 1.97e0
- Comparator
- without NPCae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3-yr average fresh matter yields of Crotalaria juncea grown for green manuring were 1.97, 1.43, 4.75, 6.18 and 6.71 t/ha with Ca, N, P, P + Ca and N + P + Ca, resp., compared with 1.27 t without NPCa.”
Claim · model-written summary
Crotalaria fresh matter yield with N was 1.43 t/ha.
- Taxon
- Crotalaria junceaCrotalaria junceae0
- Treatment
- Ne0
- Outcome
- fresh matter yieldse0
- Value
- 1.43e0
- Comparator
- without NPCae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3-yr average fresh matter yields of Crotalaria juncea grown for green manuring were 1.97, 1.43, 4.75, 6.18 and 6.71 t/ha with Ca, N, P, P + Ca and N + P + Ca, resp., compared with 1.27 t without NPCa.”
Claim · model-written summary
Crotalaria fresh matter yield with P was 4.75 t/ha.
- Taxon
- Crotalaria junceaCrotalaria junceae0
- Treatment
- Pe0
- Outcome
- fresh matter yieldse0
- Value
- 4.75e0
- Comparator
- without NPCae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3-yr average fresh matter yields of Crotalaria juncea grown for green manuring were 1.97, 1.43, 4.75, 6.18 and 6.71 t/ha with Ca, N, P, P + Ca and N + P + Ca, resp., compared with 1.27 t without NPCa.”
Claim · model-written summary
Crotalaria fresh matter yield with P plus Ca was 6.18 t/ha.
- Taxon
- Crotalaria junceaCrotalaria junceae0
- Treatment
- P + Cae0
- Outcome
- fresh matter yieldse0
- Value
- 6.18e0
- Comparator
- without NPCae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3-yr average fresh matter yields of Crotalaria juncea grown for green manuring were 1.97, 1.43, 4.75, 6.18 and 6.71 t/ha with Ca, N, P, P + Ca and N + P + Ca, resp., compared with 1.27 t without NPCa.”
Claim · model-written summary
Crotalaria fresh matter yield with N plus P plus Ca was 6.71 t/ha.
- Taxon
- Crotalaria junceaCrotalaria junceae0
- Treatment
- N + P + Cae0
- Outcome
- fresh matter yieldse0
- Value
- 6.71 t/hae0
- Comparator
- without NPCae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3-yr average fresh matter yields of Crotalaria juncea grown for green manuring were 1.97, 1.43, 4.75, 6.18 and 6.71 t/ha with Ca, N, P, P + Ca and N + P + Ca, resp., compared with 1.27 t without NPCa.”
Claim · model-written summary
N produced rice paddy yield of 0.98 t/ha versus 0.68 without NP.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 40 kg N or 20 kg P2O5/ha or NP to rice in 1960 gave paddy yields of 0.98, 0.8 and 1.79 t/ha, resp., compared with 0.68 t without NP.”
Claim · model-written summary
P produced rice paddy yield of 0.8 t/ha versus 0.68 without NP.
- Taxon
- rice
Oryza sativae0 - Treatment
- 20 kg P2O5/hae0
- Outcome
- paddy yieldse0
- Value
- 0.8e0
- Comparator
- without NPe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 40 kg N or 20 kg P2O5/ha or NP to rice in 1960 gave paddy yields of 0.98, 0.8 and 1.79 t/ha, resp., compared with 0.68 t without NP.”
Claim · model-written summary
NP produced rice paddy yield of 1.79 t/ha versus 0.68 without NP.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 40 kg N or 20 kg P2O5/ha or NP to rice in 1960 gave paddy yields of 0.98, 0.8 and 1.79 t/ha, resp., compared with 0.68 t without NP.”
Claim · model-written summary
NP increased Paspalum grain yield without Ca to 0.96 t/ha.
- Taxon
- Paspalum scrobiculatum
Paspalum scrobiculatume0 - Treatment
- NPe0
- Outcome
- Grain yieldse0
- Direction
- increasede0
- Value
- 0.96e0
- Qualifier
- without Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields of 0.28 t/ha without Ca and 0.43 t with Ca in Paspalum scrobiculatum given no NP were increased to 0.96 and 1.12 t, resp., with NP.”
Claim · model-written summary
NP increased Paspalum grain yield with Ca to 1.12 t.
- Taxon
- Paspalum scrobiculatumPaspalum scrobiculatume0
- Treatment
- NPe0
- Outcome
- Grain yieldse0
- Direction
- increasede0
- Value
- 1.12 te0
- Qualifier
- with Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields of 0.28 t/ha without Ca and 0.43 t with Ca in Paspalum scrobiculatum given no NP were increased to 0.96 and 1.12 t, resp., with NP.”
Claim · model-written summary
NP increased Hibiscus seed yield without Ca to 645 kg.
- Taxon
- Hibiscus cannabinus
Hibiscus cannabinuse0 - Treatment
- NPe0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 645e0
- Qualifier
- without Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 363 kg/ha without Ca and 497 kg with Ca in Hibiscus cannabinus given no NP were increased to 645 and 664 kg, resp., with NP”
Claim · model-written summary
NP increased Hibiscus seed yield with Ca to 664 kg.
- Taxon
- Hibiscus cannabinusHibiscus cannabinuse0
- Treatment
- NPe0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 664 kge0
- Qualifier
- with Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 363 kg/ha without Ca and 497 kg with Ca in Hibiscus cannabinus given no NP were increased to 645 and 664 kg, resp., with NP”
Claim · model-written summary
NPK increased Hibiscus fibre yield from 517 kg/ha to 1.06 t.
- Taxon
- Hibiscus cannabinusHibiscus cannabinuse1
- Treatment
- 18 kg N + 36 kg P2O5 + 27 kg K2O/hae0
- Outcome
- fibre yieldse0
- Direction
- increasede0
- Value
- 1.06 te0
- Comparator
- without NPKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fibre yields of 517 kg/ha without NPK were increased to 1.06 t with 18 kg N + 36 kg P2O5 + 27 kg K2O/ha.”
e1“Hibiscus cannabinus”
Claim · model-written summary
N raised Dolichos seed yield without Ca to 89 kg/ha.
- Taxon
- Dolichos biflorus
Vigna unguiculata subsp. cylindricae0 - Treatment
- Ne0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 89e0
- Qualifier
- without Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 42 kg/ha without Ca and 49 kg with Ca in Dolichos biflorus [Macrotyloma uniflorum] given no NP were increased to 89 and 88 kg, resp., with N, 556 and 897 kg with P and 1.05 and 1.43 t with N + P.”
Claim · model-written summary
N raised Dolichos seed yield with Ca to 88 kg.
- Taxon
- Dolichos biflorusVigna unguiculata subsp. cylindricae0
- Treatment
- Ne0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 88 kge0
- Qualifier
- with Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 42 kg/ha without Ca and 49 kg with Ca in Dolichos biflorus [Macrotyloma uniflorum] given no NP were increased to 89 and 88 kg, resp., with N, 556 and 897 kg with P and 1.05 and 1.43 t with N + P.”
Claim · model-written summary
P raised Dolichos seed yield without Ca to 556 kg.
- Taxon
- Dolichos biflorusVigna unguiculata subsp. cylindricae0
- Treatment
- Pe0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 556e0
- Qualifier
- without Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 42 kg/ha without Ca and 49 kg with Ca in Dolichos biflorus [Macrotyloma uniflorum] given no NP were increased to 89 and 88 kg, resp., with N, 556 and 897 kg with P and 1.05 and 1.43 t with N + P.”
Claim · model-written summary
P raised Dolichos seed yield with Ca to 897 kg.
- Taxon
- Dolichos biflorusVigna unguiculata subsp. cylindricae0
- Treatment
- Pe0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 897 kge0
- Qualifier
- with Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 42 kg/ha without Ca and 49 kg with Ca in Dolichos biflorus [Macrotyloma uniflorum] given no NP were increased to 89 and 88 kg, resp., with N, 556 and 897 kg with P and 1.05 and 1.43 t with N + P.”
Claim · model-written summary
N plus P raised Dolichos seed yield without Ca to 1.05 t.
- Taxon
- Dolichos biflorusVigna unguiculata subsp. cylindricae0
- Treatment
- N + Pe0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 1.05e0
- Qualifier
- without Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 42 kg/ha without Ca and 49 kg with Ca in Dolichos biflorus [Macrotyloma uniflorum] given no NP were increased to 89 and 88 kg, resp., with N, 556 and 897 kg with P and 1.05 and 1.43 t with N + P.”
Claim · model-written summary
N plus P raised Dolichos seed yield with Ca to 1.43 t.
- Taxon
- Dolichos biflorusVigna unguiculata subsp. cylindricae0
- Treatment
- N + Pe0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 1.43 te0
- Qualifier
- with Cae0
- Comparator
- no NPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 42 kg/ha without Ca and 49 kg with Ca in Dolichos biflorus [Macrotyloma uniflorum] given no NP were increased to 89 and 88 kg, resp., with N, 556 and 897 kg with P and 1.05 and 1.43 t with N + P.”
Claim · model-written summary
NPK increased niger seed yield to 150 and 466 kg without and with Ca, respectively.
- Taxon
- niger
Guizotia abyssinicae0 - Treatment
- NPKe0
- Outcome
- Seed yieldse0
- Direction
- increasede0
- Value
- 150 and 466 kge0
- Comparator
- no NPKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yields of 19 kg/ha without Ca and 36 kg with Ca in niger [Guizotia abyssinica] given no NPK were increased to 150 and 466 kg, resp., with NPK”
The same questions in other papers
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61 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- no effect
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See all 68 papers →phosphorus · yield · Vigna unguiculata (cowpea)Results differ
106 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
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See all 113 papers →nanoparticle · yield · Oryza sativa (rice)Positive and negative results
188 papers in the same direction as this paper · 11 in the opposite direction · 2 reporting no difference from an alternative
- negative
- no effect
- negative
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See all 202 papers →phosphorus · yield · Oryza sativa (rice)Positive and negative results
418 papers in the same direction as this paper · 46 in the opposite direction · 10 reporting no difference from an alternative
- negative
- no effect
- no effect
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See all 475 papers →nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- negative
- negative
- negative
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See all 2,045 papers →potassium · quality: grain · Hibiscus cannabinus (kenaf)Results agree
1 paper in the same direction as this paper
- positive
nanoparticle · yield · Paspalum scrobiculatumResults agree
2 papers in the same direction as this paper
- positive
- positive
phosphorus · yield · Crotalaria juncea (sunn hemp)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.