Abstract
Abstract Information is unavailable on the Zn status of entisols and vertisols occupying a large area of the Chad Basin in North‐Eastern Nigeria. Therefore, this investigation was carried out with the above in view. Soil samples from 7 representative profiles were analysed for mechanical composition, pH, organic carbon, available P (0.5M NaHCO3‐extractable), and available Zn (0.1N HC1‐extractable). Eight bulk soil samples were also collected, analysed for physical/chemical characteristics, and used for Zn response studies. Three plants of corn (Zea mays L.) cv. ‘123 Samaru’ per pot were grown for 7 weeks in 4 kg of soil at 0, 5 and 25 mg Zn kg‐1 soil. Dry matter yields were recorded. Available (0.1N HC1‐extractable) Zn ranged from 2.31 to 5.69 mg kg‐1 with a mean value of 3.83 mg kg‐1 soil. HC1 extractable Zn was positively correlated with organic carbon content, and had no relationship with other soil properties. There was no definitive depth distribution pattern in different soil profiles, but in clayey soil profiles Zn was generally higher in the surface horizons. Using 4.5 mg kg‐1 soil of Zn extractable in 0.1N HC1 as the critical limit, about 83% of clayey and 100% of sandy soil samples were found to be low in Zn. Zinc response in corn ranged from nil to 46%. Significant increases in yield were noted in 2 out of 8 soils and there was tendency for increase in yield in another 3 soils. Yield was generally more with 5 than with 25 mg Zn kg‐1 soil. The results showed the range of Zn fertilization of crops even under present cropping conditions in the region.
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Claims 4
Claim · model-written summary
Zinc response in corn ranged from nil to 46%.
- Taxon
- corn
Zea mays subsp. mayse0 - Outcome
- Zinc response in corne0
- Value
- nil to 46%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc response in corn ranged from nil to 46%.”
Claim · model-written summary
Yield increased significantly in two of eight soils.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Zne1
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 2 out of 8 soilse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant increases in yield were noted in 2 out of 8 soils”
e1“Yield was generally more with 5 than with 25 mg Zn kg‐1 soil.”
t0“corn (Zea mays L.) cv. ‘123 Samaru’”
Claim · model-written summary
Yield tended to increase in three additional soils.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was tendency for increase in yield in another 3 soils.”
e1“Yield was generally more with 5 than with 25 mg Zn kg‐1 soil.”
t0“corn (Zea mays L.) cv. ‘123 Samaru’”
Claim · model-written summary
Yield was generally higher with 5 than 25 mg Zn kg‐1 soil.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- 5e0
- Outcome
- Yielde0
- Direction
- moree0
- Comparator
- 25 mg Zn kg‐1 soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was generally more with 5 than with 25 mg Zn kg‐1 soil.”
t0“corn (Zea mays L.) cv. ‘123 Samaru’”
The same questions in other papers
zinc atom · yield · Zea mays (maize)Results differ
390 papers in the same direction as this paper · 47 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- no effect
437 papers more in this group
See all 441 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.