Abstract
Trials were conducted at three locations on Alfisols in southwestern Nigeria to study the optimum phosphorus - zinc balance in the soil for field grown maize (Zea mays L) and cowpea (Vigna unguiculata s. sp. unguiculata L. Walp). The incidence of P induced Zn deficiency in maize was observed to be more probable in the sandy soils of the savanna zone than in the sandy loam soils of the forest zone. Correcting P deficiency without correcting Zn deficiency resulted in lower maize yields. In soils with Bray-1 P test of > 7.0 ppm and 0.1N HCL extractable Zn of < 1.0 ppm, further addition of P. was observed to induce Zn deficiency in maize. Cowpea was less sensitive to either the deficiencies of P and Zn or to the incidence of P induced Zn deficiency.
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Claims 4
Claim · model-written summary
P-induced Zn deficiency in maize was more probable in savanna sandy soils than forest sandy loams.
- Outcome
- incidence of P induced Zn deficiencye0
- Direction
- more probablee0
- Comparator
- forest zonee0
- Setting
- savanna zonee0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of P induced Zn deficiency in maize was observed to be more probable in the sandy soils of the savanna zone than in the sandy loam soils of the forest zone.”
Claim · model-written summary
Correcting P deficiency alone lowered maize yield when Zn deficiency persisted.
- Treatment
- Correcting P deficiency without correcting Zn deficiencye0
- Outcome
- maize yieldse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correcting P deficiency without correcting Zn deficiency resulted in lower maize yields.”
Claim · model-written summary
Additional P induced Zn deficiency in maize in soils above 7.0 ppm Bray-1 P and below 1.0 ppm extractable Zn.
- Treatment
- further addition of P.e0
- Outcome
- Zn deficiencye0
- Qualifier
- Bray-1 P test of > 7.0 ppm and 0.1N HCL extractable Zn of < 1.0 ppme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In soils with Bray-1 P test of > 7.0 ppm and 0.1N HCL extractable Zn of < 1.0 ppm, further addition of P. was observed to induce Zn deficiency in maize.”
Claim · model-written summary
Cowpea was less sensitive to P and Zn deficiencies and P-induced Zn deficiency.
- Taxon
- Cowpea
Vigna unguiculatae0 - Outcome
- sensitive to either the deficiencies of P and Zn or to the incidence of P induced Zn deficiencye0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea was less sensitive to either the deficiencies of P and Zn or to the incidence of P induced Zn deficiency.”
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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.