Abstract

ABSTRACT Field studies were conducted to evaluate the effects of compost, NPK fertilizer and maize-cowpea intercropping on maize grain yield during the 2021 and 2022 cropping seasons at Botanga and Golinga in the Northern Region of Ghana. Five levels of spatial row arrangements and three levels of fertilizer types were evaluated as a 5 × 3 factorial in a randomized complete block design with three replications. Data were subjected to ANOVA using GenStat statistical package, 13th edition, and means were separated using least significant difference and Duncan multiple range test at 95% confidence level and presented in tables. The interaction between maize-cowpea intercropping and fertilizer application had significant (p < 0.05) effects on maize grain yield. Maize grain yields were relatively increased by 1M1C intercropping pattern grown with NPK fertilizer at Botanga in 2021 (4194 kg ha−1) and 2022 (4207 kg ha−1) and at Golinga in 2021 (3933 kg ha−1) and 2022 (4001 kg ha−1) with a significant difference between the two experimental locations. It was observed that the role of cowpea in soil enrichment, high plant densities and yield components largely contributed to the high grain yield of maize in the 1M1C intercropping pattern, which could be recommended to farmers.

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