Abstract
Field experiments were conducted at the Teaching and Research Farm of the Federal University of Agriculture, Abeokuta (7o 20?N, 30 23?E) during the 2014 early and late cropping seasons to evaluate the effect of weeding frequency and phosphorus fertilizer application on the growth and grain yield of the early maturing cowpea variety (Vigna unguiculata L. Walp). The experiment was laid out in a split-plot arrangement fitted into a Randomized Complete Block Design with three replications. The main plot consisted of three phosphorus fertilizer rates (0, 15 and 30 P2O5kg ha-1) while the subplot comprised five weeding frequencies (no weeding, weed-free, hoe weeding at 3 weeks after sowing (WAS), hoe weeding at 3 and 6 WAS and weeding at 3, 6 and 9 WAS). The results showed that plots treated with phosphorus fertilizer at 15 kg ha-1 produced the highest number of leaves and the tallest plant in the late season while the highest grain yield was recorded in the early trials. Weeding at 3, 6 and 9 WAS during the early season trial gave the highest grain yield compared with other weeding treatments. Unchecked weed infestation reduced yield by 53.10 % and 49.9 % in the early and late seasons respectively compared to the maximum obtained from weed-free plots. This study concluded that application of 15 kg P2O5 ha-1 and weed removal at 3, 6 and 9 WAS were effective for effective weed control and optimum grain yield in cowpea production.
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Claims 6
Claim · model-written summary
Phosphorus at 15 kg ha-1 gave the highest number of leaves and the tallest plants in the late season.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- phosphorus fertilizer at 15 kg ha-1e1
- Outcome
- number of leaves and the tallest plante1
- Direction
- higheste1
- Setting
- late seasone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“extra early cowpea”
e1“The results showed that plots treated with phosphorus fertilizer at 15 kg ha-1 produced the highest number of leaves and the tallest plant in the late season while the highest grain yield was recorded in the early trials”
Claim · model-written summary
The highest cowpea grain yield was recorded in the early trials.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- grain yielde1
- Direction
- higheste1
- Setting
- early trialse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“extra early cowpea”
e1“The results showed that plots treated with phosphorus fertilizer at 15 kg ha-1 produced the highest number of leaves and the tallest plant in the late season while the highest grain yield was recorded in the early trials”
Claim · model-written summary
Weeding at 3, 6 and 9 WAS gave the highest cowpea grain yield compared with other weeding treatments in the early season.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Weeding at 3, 6 and 9 WASe2
- Outcome
- grain yielde2
- Direction
- higheste2
- Comparator
- other weeding treatmentse2
- Setting
- early season triale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“extra early cowpea”
e2“Weeding at 3, 6 and 9 WAS during the early season trial gave the highest grain yield compared with other weeding treatments”
Claim · model-written summary
Unchecked weed infestation reduced cowpea yield by 53.10% in the early season relative to weed-free plots.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Unchecked weed infestatione3
- Interactor
- weede3weed
- Outcome
- yielde3
- Direction
- reducede3
- Value
- 53.10 %e3
- Comparator
- weed-free plotse3
- Setting
- earlye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“extra early cowpea”
e3“Unchecked weed infestation reduced yield by 53.10 % and 49.9 % in the early and late seasons respectively compared to the maximum obtained from weed-free plots”
Claim · model-written summary
Unchecked weed infestation reduced cowpea yield by 49.9% in the late season relative to weed-free plots.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Unchecked weed infestatione3
- Interactor
- weede3weed
- Outcome
- yielde3
- Direction
- reducede3
- Value
- 49.9 %e3
- Comparator
- weed-free plotse3
- Setting
- latee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“extra early cowpea”
e3“Unchecked weed infestation reduced yield by 53.10 % and 49.9 % in the early and late seasons respectively compared to the maximum obtained from weed-free plots”
Claim · model-written summary
Application of 15 kg P2O5 ha-1 with weed removal at 3, 6 and 9 WAS is recommended for optimum cowpea grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- application of 15 kg P2O5 ha-1e4
- Outcome
- optimum grain yielde4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“extra early cowpea”
e4“application of 15 kg P2O5 ha-1 and weed removal at 3, 6 and 9 WAS were effective for effective weed control and optimum grain yield in cowpea production”
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See all 53 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.