| Water management | Nitrogen fertilizer level |
| No nitrogen fertilizer (N0) | |
| Alternate wetting and drying (AWD) | Urea 60 kg N/ha (N1) |
| 90 kg N/ha (N2) | |
| No nitrogen fertilizer (N0) | |
| Moist condition between saturation and field capacity (MC) | 60 kg N/ha (N1) |
| 90 kg N/ha (N2) | |
| No nitrogen fertilizer (N0) | |
| Continuous submergence (CS) | 60 kg N/ha (N1) |
| 90 kg N/ha (N2) |