| Period | Date | |
| Control site | Cyclic irrigation site | |
| Land preparation | 5/3 | 5/3 |
| Puddling | 5/5 | 5/5 |
| Transplanting | 5/10 | 5/8 |
| (Mid−summer drainage) | (6/25 - 7/9) | (6/30 - 7/12) |
| Heading time | 7/20 | 8/1 |
| Additional fertilizer | 7/28 | 7/14 |
| Harvest | 9/5 | 9/6 |