Abstract
Abstract The effects of four rates of N (0, 40, 80, and 120 kg/ha) and three rates of P (0, 13, and 26 kg/ha) on maize ( Zea mays L.) response were investigated for no‐tillage and conventionally plowed plots on an Alfisol in southwestern Nigeria. These, experiments were conducted for three consecutive seasons. Notillage treatments yielded more than conventionally plowed plots in all three seasons. The mean yields were 2.90 and 2.42 metric tons/ha, respectively. There was no effect of P on grain yield. Nitrogen application had a significant effect on grain yield in all three seasons. Relative grain yield in the plowed plots without N application was 0.85 of that in no‐tillage plots. These results, obtained 6 years after adopting these tillage systems, are contradictory to those obtained in the first year of adopting these tillage practices. Leaf concentration of N was affected only by levels of N application.
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Claims 5
Claim · model-written summary
No-tillage yielded more maize than conventional plowing over three seasons.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Notillage treatments yielded more than conventionally plowed plots in all three seasons. The mean yields were 2.90 and 2.42 metric tons/ha, respectively.”
e1“maize ( Zea mays L.) response”
Claim · model-written summary
Phosphorus had no effect on maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of P on grain yield”
e1“maize ( Zea mays L.) response”
Claim · model-written summary
Nitrogen application significantly affected grain yield in all three seasons.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application had a significant effect on grain yield in all three seasons”
e1“maize ( Zea mays L.) response”
Claim · model-written summary
Without nitrogen, plowed-plot yield was 0.85 of no-tillage yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield in the plowed plots without N application was 0.85 of that in no‐tillage plots”
e1“maize ( Zea mays L.) response”
Claim · model-written summary
Leaf nitrogen concentration varied only with nitrogen application level.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf concentration of N was affected only by levels of N application”
e1“maize ( Zea mays L.) response”
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This paper is about lacking the nutrient, so it counts the other way round here.
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See all 2,185 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.