| Cropping system (CS) | Plant population | Number of cobs | Cobs weight |
| Wheat-maize | 61,726 | 54,780b | 5863b |
| Chickpea-maize | 63,512 | 60,446a | 7524a |
| Significance (p ≤ 0.05) | NS | * | * |
| Biochar (BC) (t∙ha−1) |
|
|
|
| 0 | 58,095 | 51,941b | 5881b |
| 40 | 63,572 | 60,238ab | 6762ab |
| 60 | 63,095 | 57,024ab | 7250a |
| 80 | 65,714 | 61,250a | 6881ab |
| LSD(P ≤ 0.05) | NS | 8848 | 1223 |
| Interaction |
|
|
|
| CS × BC | NS | ** | ** |