Abstract
B. Osundare ABSTRACT: Although, in Southwestern Nigeria, many aspects of Agronomy of cowpea have been accorded research attention with a view to raising its present yield on farmers' farms, However, there is still dearth of published scientific data and information on soil nutrient status and weed biomass as affected by cowpea - based intercropping systems. To this end, a two - year field experiment was conducted in 2010 and 2011 cropping seasons at the Teaching and Research Farm of the Ekiti State University, Ado - Ekiti, Ekiti State, Nigeria, to evaluate the effects of different cowpea - based crop mixtures on soil nutrient status, weed biomass, yield and yield components of cowpea (Vigna unguiculata). The experiment was laid out in a randomized complete block design with three replicates. The different cowpea - based crop mixtures included: sole cropped cowpea (SCC), which served as the control; cowpea / maize (CM); cowpea / cocoyam (CC) and cowpea / okra / melon (COM). The results obtained indicated existence of significant (P = 0.05) differences among the different cowpea - based crop mixtures as regards their effects on weed biomass, yield and yield components of cowpea. Relative to the initial nutrient status of the soil, prior to 2010 cropping season, the percentage decreases in soil organic carbon (SOC), adduced to cowpea - based mixtures, after 2010 cropping season were 9, 18, 27 and 23 for the respective SCC, CM, CC and COM. Conversely, at the end of 2011 cropping season, increases of 5, 14, 21 and 27% in SOC were recorded for SCC, CM, CC and COM, respectively. At the end of 2010 cropping season, cowpea - based mixtures resulted in decreases of 8, 31, 23 and 18% in total N for the respective SCC, CM, CC and COM. On the contrary, at the end of 2011 cropping season, cowpea - based mixtures resulted in increases of 10, 18, 3 and 26% in total N for SCC, CM, CC and COM, respectively. Available P decreased at the end of 2010 cropping season by 7, 21, 16 and 26% for the respective SCC, CM, CC and COM. In contrast, available P increased at the end of 2011 cropping season by 9, 21, 16 and 28% for SCC, CM, CC and COM, respectively. The mean values of cowpea seed yield data over the two years of experimentation indicated that, cowpea - based intercropping significantly decreased cowpea seed yield from 4.3 t ha -1 for SCC to 3.77, 3.32 and 3.98 t ha -1 for CM, CC and COM, respectively.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 14
Claim · model-written summary
Crop mixtures differed significantly in weed biomass and cowpea yield traits.
- Taxon
- cowpea
Vigna unguiculatae0 - Interactor
- weede0weed
- Outcome
- weed biomass, yield and yield components of cowpeae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant (P = 0.05) differences among the different cowpea - based crop mixtures as regards their effects on weed biomass, yield and yield components of cowpea”
Claim · model-written summary
SOC fell by 9% under sole cowpea after 2010.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- SCCe0
- Outcome
- soil organic carbon (SOC)e0
- Direction
- decreasese0
- Value
- 9e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage decreases in soil organic carbon (SOC), adduced to cowpea - based mixtures, after 2010 cropping season were 9, 18, 27 and 23 for the respective SCC, CM, CC and COM”
Claim · model-written summary
SOC fell by 18% under cowpea and maize after 2010.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- CMe0
- Outcome
- soil organic carbon (SOC)e0
- Direction
- decreasese0
- Value
- 18e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage decreases in soil organic carbon (SOC), adduced to cowpea - based mixtures, after 2010 cropping season were 9, 18, 27 and 23 for the respective SCC, CM, CC and COM”
Claim · model-written summary
SOC fell by 27% under cowpea and cocoyam after 2010.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- CCe0
- Outcome
- soil organic carbon (SOC)e0
- Direction
- decreasese0
- Value
- 27e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage decreases in soil organic carbon (SOC), adduced to cowpea - based mixtures, after 2010 cropping season were 9, 18, 27 and 23 for the respective SCC, CM, CC and COM”
Claim · model-written summary
SOC fell by 23% under cowpea, okra and melon after 2010.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- COMe0
- Outcome
- soil organic carbon (SOC)e0
- Direction
- decreasese0
- Value
- 23e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage decreases in soil organic carbon (SOC), adduced to cowpea - based mixtures, after 2010 cropping season were 9, 18, 27 and 23 for the respective SCC, CM, CC and COM”
Claim · model-written summary
SOC rose by 5% under sole cowpea after 2011.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases of 5, 14, 21 and 27% in SOC were recorded for SCC, CM, CC and COM, respectively”
t0“And Cowpea”
Claim · model-written summary
SOC rose by 14% under cowpea and maize after 2011.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases of 5, 14, 21 and 27% in SOC were recorded for SCC, CM, CC and COM, respectively”
t0“And Cowpea”
Claim · model-written summary
SOC rose by 21% under cowpea and cocoyam after 2011.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases of 5, 14, 21 and 27% in SOC were recorded for SCC, CM, CC and COM, respectively”
t0“And Cowpea”
Claim · model-written summary
SOC rose by 27% under cowpea, okra and melon after 2011.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases of 5, 14, 21 and 27% in SOC were recorded for SCC, CM, CC and COM, respectively”
t0“And Cowpea”
Claim · model-written summary
Total N fell by 8, 31, 23 and 18% across the respective mixtures after 2010.
- Taxon
- cowpeaVigna unguiculatae0
- Outcome
- total Ne0
- Direction
- decreasese0
- Value
- 8, 31, 23 and 18%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea - based mixtures resulted in decreases of 8, 31, 23 and 18% in total N for the respective SCC, CM, CC and COM”
Claim · model-written summary
Total N rose by 10, 18, 3 and 26% across the respective mixtures after 2011.
- Taxon
- cowpeaVigna unguiculatae0
- Outcome
- total Ne0
- Direction
- increasese0
- Value
- 10, 18, 3 and 26%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea - based mixtures resulted in increases of 10, 18, 3 and 26% in total N for SCC, CM, CC and COM, respectively”
Claim · model-written summary
Available P fell by 7, 21, 16 and 26% across the respective mixtures after 2010.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- Available Pe0
- Direction
- decreasede0
- Value
- 7, 21, 16 and 26%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Available P decreased at the end of 2010 cropping season by 7, 21, 16 and 26% for the respective SCC, CM, CC and COM”
t0“And Cowpea”
Claim · model-written summary
Available P rose by 9, 21, 16 and 28% across the respective mixtures after 2011.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- available Pe0
- Direction
- increasede0
- Value
- 9, 21, 16 and 28%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“available P increased at the end of 2011 cropping season by 9, 21, 16 and 28% for SCC, CM, CC and COM”
t0“And Cowpea”
Claim · model-written summary
Intercropping reduced cowpea seed yield versus sole cowpea.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- cowpea - based intercroppinge0
- Outcome
- cowpea seed yielde0
- Direction
- decreasede0
- Value
- 3.77, 3.32 and 3.98 t ha -1e0
- Comparator
- SCCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cowpea - based intercropping significantly decreased cowpea seed yield from 4.3 t ha -1 for SCC to 3.77, 3.32 and 3.98 t ha -1 for CM, CC and COM, respectively”
The same questions in other papers
intercropping · yield · Vigna unguiculata (cowpea)Results differ
39 papers in the same direction as this paper · 63 in the opposite direction
- positive
- positive
- positive
99 papers more in this group
See all 103 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.