Abstract
Field studies conducted in 2016 and 2017 in Calabar, Nigeria, evaluated the influence of tillage methods on weed control and yield of cowpea (Vigna unguiculata [L.] Walp). These were split-plot experiments laid out in a randomized complete block design with three replications; involving no-tillage, plough + harrow, hoe tillage and SAMPEA 11, SAMPEA 12 and "Kanannado" cowpea varieties. Analysis of variance indicated significant (P 0.05) tillage, cowpea varieties and their interaction effects on weed control and yields of cowpea. Tillage system did not change the soil texture. The results obtained could not be attributed to environmental changes as the weather data for the 2 years were not unique, rather they followed a similar trend. Longer pods with the highest number of pods plant -1 , seeds pod -1 , and seed yield (kg) ha -1 of cowpea were produced in ploughed plus harrowed plots. "Kanannado" reduced weed dry matter by 50.32% and 49.39% over SAMPEA 12 and SAMPEA 11, respectively. "Kanannado" combined with no-tillage (92.00 kg ha -1 ) was similar (P > 0.05) to SAMPEA 11 combined with notillage (101.50 kg ha -1 ). However, the combination of SAMPEA 12 with ploughing and harrowing produced the highest seed yield (667.00 kg ha -1 ) and was recommended for adoption based on outstanding yield and satisfactory weed control in cowpea production in the study area.
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Claims 10
Claim · model-written summary
Tillage, cowpea variety, and their interaction significantly affected weed control and yields.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- tillagee0
- Outcome
- weed control and yields of cowpeae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant (P 0.05) tillage, cowpea varieties and their interaction effects on weed control and yields of cowpea”
Claim · model-written summary
Tillage system did not change soil texture.
Not reportedTaxonComparator
Verbatim
e0“Tillage system did not change the soil texture”
Claim · model-written summary
Ploughing and harrowing produced longer cowpea pods.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- ploughed plus harrowed plotse0
- Outcome
- podse0
- Direction
- Longere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Longer pods with the highest number of pods plant -1 , seeds pod -1 , and seed yield (kg) ha -1 of cowpea were produced in ploughed plus harrowed plots”
Claim · model-written summary
Ploughing and harrowing produced the highest pods per plant and seeds per pod.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- ploughed plus harrowed plotse0
- Outcome
- number of pods plant -1 , seeds pod -1e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Longer pods with the highest number of pods plant -1 , seeds pod -1 , and seed yield (kg) ha -1 of cowpea were produced in ploughed plus harrowed plots”
Claim · model-written summary
Ploughing and harrowing produced the highest cowpea seed yield.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- ploughed plus harrowed plotse0
- Outcome
- seed yield (kg) ha -1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield (kg) ha -1 of cowpea were produced in ploughed plus harrowed plots”
Claim · model-written summary
Kanannado reduced weed dry matter by 50.32% versus SAMPEA 12.
- Material
- Kanannadoe0
- Treatment
- Kanannadoe0
- Outcome
- weed dry mattere0
- Direction
- reducede0
- Value
- 50.32%e0
- Comparator
- SAMPEA 12e0
Not reportedTaxonInteractor
Verbatim
e0“"Kanannado" reduced weed dry matter by 50.32% and 49.39% over SAMPEA 12 and SAMPEA 11, respectively”
Claim · model-written summary
Kanannado reduced weed dry matter by 49.39% versus SAMPEA 11.
- Material
- Kanannadoe0
- Treatment
- Kanannadoe0
- Outcome
- weed dry mattere0
- Direction
- reducede0
- Value
- 49.39%e0
- Comparator
- SAMPEA 11e0
Not reportedTaxon
Verbatim
e0“"Kanannado" reduced weed dry matter by 50.32% and 49.39% over SAMPEA 12 and SAMPEA 11, respectively”
Claim · model-written summary
Kanannado with no-tillage yielded 92.00 kg ha -1, statistically similar to SAMPEA 11 with no-tillage at 101.50 kg ha -1.
- Material
- Kanannadoe0
- Treatment
- no-tillagee0
- Outcome
- Kanannadoe0
- Direction
- similare0
- Value
- 92.00 kg ha -1e0
- Qualifier
- 101.50 kg ha -1e0
- Comparator
- SAMPEA 11e0
Not reportedTaxon
Verbatim
e0“"Kanannado" combined with no-tillage (92.00 kg ha -1 ) was similar (P > 0.05) to SAMPEA 11 combined with notillage (101.50 kg ha -1 )”
Claim · model-written summary
SAMPEA 12 with ploughing and harrowing gave the highest seed yield, 667.00 kg ha -1.
- Material
- SAMPEA 12e0
- Treatment
- ploughing and harrowinge0
- Outcome
- seed yielde0
- Direction
- higheste0
- Value
- 667.00 kg ha -1e0
Not reportedTaxonComparator
Verbatim
e0“the combination of SAMPEA 12 with ploughing and harrowing produced the highest seed yield (667.00 kg ha -1 )”
Claim · model-written summary
The authors recommend SAMPEA 12 with ploughing and harrowing for adoption.
- Taxon
- cowpeaVigna unguiculatae0
- Outcome
- recommended for adoptione0
- Qualifier
- outstanding yield and satisfactory weed controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was recommended for adoption based on outstanding yield and satisfactory weed control in cowpea production in the study area”
The same questions in other papers
tillage · yield · Vigna unguiculata (cowpea)Results differ
26 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- negative
31 papers more in this group
See all 35 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.