| Cropping systema | Treatmentb | N recovery rate (%) | ||
| Summer crop | Winter crop | Average in summer and winter crops | ||
| M + IR | CM + CF | 53.8 | 52.0 | 53.2 |
| CM | 57.8 | 39.8 | 51.8 | |
| DDEM | 48.1 | 33.3 | 43.1 | |
| NF | - | - | - | |
| S + IR | CM + CF | 65.2 | 54.0 | 61.4 |
| CM | 63.1 | 45.4 | 57.2 | |
| DDEM | 58.5 | 41.8 | 52.9 | |
| NF | - | - | - | |