Soil type | Rhizosphere sampling time (days post treatment) | Herbicide | Herbicide rate (kg ae/ha) |
Sandy loam | 1, 3, 7, 14, 30 | None | 0 |
| 1, 3, 7, 14, 30 | 2,4-D + glyphosate | 1.06 + 1.13 |
| 1, 3, 7, 14, 30 | Glyphosate | 1.13 |
Silty clay loam | 1, 3, 7, 14, 30 | None | 0 |
| 1, 3, 7, 14, 30 | 2,4-D + glyphosate | 1.06 + 1.13 |
| 1, 3, 7, 14, 30 | Glyphosate | 1.13 |