| Treatment | Total variables (US$) | Maize Income (US$) | Cowpeas Income (US$) | Total Income (US$) | Gross Margin (US$) |
| Cowpeas outside basin | 75.80 | 367.12 | 59.84 | 426.96 | 351.16 |
| Within basin | 75.80 | 491.97 | 90.20 | 582.17 | 506.37 |
| Sole maize | 60.20 | 337.15 | - | 337.15 | 276.95 |
| Sole cowpeas | 60.20 | - | 64.24 | 64.24 | 4.04 |