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