Abstract
Field trials were conducted at the Research Farm of Niger State College of Agriculture, Mokwa, in the Southern Guinea Savanna of Nigeria during the 2019 and 2020 wet seasons to investigate the Reaction of cowpea varieties to periods of weed interference. The treatments were made of four cowpea varieties and ten periods of weed-interference in two sets. One set of the weed interference treatment plots were kept weed-free for 3, 6, 9, 12 weeks after sowing (WAS) till harvest while the other sets of treatment plots were left weed infested for the corresponding periods. There were two control treatments in which one plot was kept weed free till harvest while the other plot was left infested until harvest. The treatments were laid out in a split- plot design with three replications in a randomized complete block design where the main plot was assigned to cowpea varieties and the sub-plot to periods of weed interference. The results obtained from the study indicate that cowpea variety IT90k-277-2 and IT98k-305 produced significantly (P<0.05) highest grain yield compared to the other varieties in both years. Weed dry matter production was highest in IT98k-305 but was least with Dan Sokoto variety. Weeding cowpea for 3 WAS only was quite inadequate for effective weed control and promotion of acceptable grain yield. Cowpea varieties IT90k-277-2 and IT98k-305 are recommended for cultivation while a weed-free period for the first 4 – 6 WAS of growth is required for optimum grain yield in the study area.
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Claims 6
Claim · model-written summary
Cowpea varieties IT90k-277-2 and IT98k-305 gave the highest grain yield, significantly, compared with the other varieties.
- Taxon
- cowpea
Vigna unguiculatae0 - Material
- IT90k-277-2 and IT98k-305e0
- Outcome
- grain yielde0
- Direction
- higheste0
- Qualifier
- P<0.05e0
- Comparator
- the other varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea variety IT90k-277-2 and IT98k-305 produced significantly (P<0.05) highest grain yield compared to the other varieties in both years”
Claim · model-written summary
Weed dry matter production was highest in cowpea variety IT98k-305.
- Taxon
- cowpeaVigna unguiculatae0
- Material
- IT98k-305e1
- Interactor
- weede1weed
- Outcome
- Weed dry matter productione1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea variety IT90k-277-2 and IT98k-305 produced significantly (P<0.05) highest grain yield compared to the other varieties in both years”
e1“Weed dry matter production was highest in IT98k-305”
Claim · model-written summary
Weed dry matter production was least with the Dan Sokoto cowpea variety.
- Taxon
- cowpeaVigna unguiculatae0
- Material
- Dan Sokotoe2
- Interactor
- weede1weed
- Outcome
- Weed dry matter productione1
- Direction
- leaste2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea variety IT90k-277-2 and IT98k-305 produced significantly (P<0.05) highest grain yield compared to the other varieties in both years”
e1“Weed dry matter production was highest in IT98k-305”
e2“but was least with Dan Sokoto variety”
Claim · model-written summary
Weeding cowpea for 3 weeks after sowing only was inadequate for effective weed control and acceptable grain yield.
- Taxon
- cowpeaVigna unguiculatae3
- Treatment
- Weeding cowpea for 3 WAS onlye3
- Interactor
- weede3weed
- Outcome
- effective weed control and promotion of acceptable grain yielde3
- Direction
- inadequatee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Weeding cowpea for 3 WAS only was quite inadequate for effective weed control and promotion of acceptable grain yield”
Claim · model-written summary
A weed-free period for the first 4 to 6 weeks after sowing is required for optimum grain yield.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- weed-free period for the first 4 – 6 WASe4
- Outcome
- optimum grain yielde4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea variety IT90k-277-2 and IT98k-305 produced significantly (P<0.05) highest grain yield compared to the other varieties in both years”
e4“a weed-free period for the first 4 – 6 WAS of growth is required for optimum grain yield”
Claim · model-written summary
Cowpea varieties IT90k-277-2 and IT98k-305 are recommended for cultivation.
- Taxon
- CowpeaVigna unguiculatae5
- Material
- IT90k-277-2 and IT98k-305e5
- Outcome
- recommended for cultivatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Cowpea varieties IT90k-277-2 and IT98k-305 are recommended for cultivation”
The same questions in other papers
herbicide · weed · Vigna unguiculata (cowpea)Positive and negative results
1 paper in the same direction as this paper · 32 in the opposite direction
- positive
- positive
- positive
30 papers more in this group
See all 34 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.