Abstract
SUMMARY Field studies were conducted in order to determine the components of yield and response of maizeto soil applied copper and sulphur in the rainforest-savannah transition zone and Guinea savannah zone of Nigeria. Five CuO treatments, 0, 1, 3, 6 and 9 kg/ha, were applied to maize in 1988–90, and grain yield was consistently and significantly increased by the 1 kg/ha CuO treatment. Five S treatments, 0, 10, 20, 40 and 80 kg/ha, were applied to maize in 1989–90, and all treatments increased grain yield significantly in 1989, but only the 10 kg/ha S treatment increased grain yield significantly in 1990. Higher amounts of applied S increased leaf S significantly in the Guinea savannah zone.
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Claims 4
Claim · model-written summary
The 1 kg/ha CuO treatment consistently and significantly increased maize grain yield during 1988–90.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Five CuO treatments, 0, 1, 3, 6 and 9 kg/ha, were applied to maize in 1988–90, and grain yield was consistently and significantly increased by the 1 kg/ha CuO treatment.”
Claim · model-written summary
All sulphur treatments significantly increased maize grain yield in 1989.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Five S treatments, 0, 10, 20, 40 and 80 kg/ha, were applied to maize in 1989–90, and all treatments increased grain yield significantly in 1989”
Claim · model-written summary
Only the 10 kg/ha sulphur treatment significantly increased maize grain yield in 1990.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the 10 kg/ha S treatment increased grain yield significantly in 1990”
t0“maize”
Claim · model-written summary
Higher amounts of applied sulphur significantly increased maize leaf sulphur in the Guinea savannah zone.
- Treatment
- Higher amounts of applied Se0
- Outcome
- leaf Se0
- Direction
- increasede0
- Setting
- Guinea savannah zonee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher amounts of applied S increased leaf S significantly in the Guinea savannah zone.”
t0“maize”
The same questions in other papers
sulfur atom · yield · Zea mays (maize)Results differ
68 papers in the same direction as this paper · 12 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
78 papers more in this group
See all 82 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.