| Cropping system | Factors and levels | Scenarios |
| Fallow-cowpea | 4 cowpea planting dates | 4 |
| Fallow-wheat | 6 wheat planting dates × 3 N rates | 18 |
| Cowpea-wheat | 4 cowpea planting dates × 6 wheat planting dates × 3 N rates | 72 |
| Total scenarios |
| 94 |
| Total seasons |
| 81 |
| Total modal runs |
| 7614 |