| Treatment | Maize yield kg·ha−1 | Maize stover kg·ha−1 |
| Sole Maize | 1226b | 1614b |
| Sole Cowpeas | - | - |
| Intercrop same basin | 1789a | 2203a |
| Intercrop outside basin | 1335b | 1521b |
| Grand mean | 1450 | 1779 |
| Significance level | <0.001 | <0.001 |
| L.S.D (0.05) | 173.0 | 130.4 |
| C.V% | 6.9 | 4.2 |