| Cropping system (CS) | Grain yield | Stover yield | Harvest index | |
| Wheat-maize | 4046b | 9057 | 27 | |
| Chickpea-maize | 5261a | 11,080 | 28 | |
| Significance (p ≤ 0.05) | * | NS | NS | |
| Biochar (BC) (t∙ha−1) |
|
| ||
| 0 | 3685b | 9125 | 24 | |
| 40 | 5098a | 11,000 | 29 | |
| 60 | 4748a | 9417 | 28 | |
| 80 | 5084a | 10,732 | 28 | |
| LSD value ( p ≤ 0.05) | 969 | NS | NS | |
| Interaction |
|
| ||
| CS × BC | * | * | NS | NS |