Abstract
Promising varieties of cowpea were found to be adaptable in the derived savannah; however, their performances in intercropping systems have not been investigated. Therefore, there is the need to investigate the effect of spatial arrangement of maize/cowpea on the performance of maize and cowpea. The experiment was a 2 x 5 factorial in randomized complete block design. A field experiment was conducted at Federal College of Education, Osiele, Abeokuta, Nigeria during the late cropping seasons of 2009 and 2010. The intercrop proportion mixture and population adopted in this study were additive and replacement series while Oloyin and Sokoto cowpea varieties were combined with TZESR-W maize variety as follows: Oloyin + maize in alternate row, Oloyin + maize in alternate row, Oloyin + maize in alternate stand, Oloyin + maize in strip cropping, Sokoto + maize in alternate row, Sokoto + maize in alternate row, Sokoto +
Highlights
Iyasere while analysis and interpretation were done by Adigbo and Iyasere
The two additive series had higher land equivalent ratio compared to replacement series
Seed weight than that of Sokoto in both cropping seasons whereas the 1000-seed weights were not influenced by the spatial arrangements in 2009
Summary
Iyasere while analysis and interpretation were done by Adigbo and Iyasere. Olowe, Fabunmi and Adejuyigbe contributed to literature, editing and useful suggestions. A field experiment was conducted during the late cropping season at Federal College of Education, Osiele, Abeokuta in 2009 and 2010 to investigate the effect of spatial arrangement of maize/cowpea on the performance of maize and cowpea. The intercrop proportion mixture and population adopted in this study were additive and replacement series while Oloyin and Sokoto cowpea varieties were combined with TZESR-W maize variety. The grain yield of cowpea obtained from alternate row intercrop and sole cowpea for 2009 and 2010 were similar. The grain yield of cowpea obtained from alternate row was 33, 37 and 59% higher than alternated stand, alternate row replacement and strip crop, respectively. Oloyin variety had significantly higher grain yield than Sokoto. The two additives arrangement enhances the performance grain yield of maize, Oloyin and Sokoto cowpea varieties. The total world production of dry cowpea grain in 2002 was about 5 million tonnes from 14 million ha of which 64%
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