| Treatment | Rate (kg ai/ha) | Hilling (WAP) | Average root dry weight (g) | |
| Check | 0 | - | 9.3 | a |
| Hand Weeding | 0 | - | 12.9 | a |
| Metribuzin (M) | 0.35 | - | 9.6 | a |
| M | 0.56 | - | 12.3 | a |
| M | 0.75 | - | 11.1 | a |
| M | 0 | 6 | 12.3 | a |
| M | 0.35 | 6 | 11.7 | a |
| M | 0.56 | 6 | 12.1 | a |
| M | 0.75 | 6 | 13.4 | a |
| M | 0 | 7 | 9.2 | a |
| M | 0.35 | 7 | 11.0 | a |
| M | 0.56 | 7 | 12.9 | a |
| M | 0.75 | 7 | 11.7 | a |
| M | 0 | 8 | 10.8 | a |
| M | 0.35 | 8 | 13.6 | a |
| M | 0.56 | 8 | 12.1 | a |
| M | 0.75 | 8 | 13.1 | a |