Abstract
Persistence and movement of 14C-dicamba was determined in the top 90 cm of a clay loam soil in 30 × 100 cm intact soil lysimeters in the field during a 16-mo period. All of the applied 14C was still in the profile 1 month after application (MAA). Although 97% was still in the top 20 cm depth, small amounts of 14C (<0.1% of applied) were found at the 80-90 cm depth. This was the only time during the study that 14C was found this deep. Of the 89% of the applied 14C remaining at 1 MAA in the top 10 cm of soil, 6% was dicamba and 27% was 3,6-dichloro-2-hydroxybenzoic acid. At 6 MAA, 50% of applied 14C was still present in the soil profile, 99% of which was in the top 20 cm of soil. Of the 54 % of the applied 14C remaining in the top 10 cm of soil, 11% was 3,6-dichloro-2-hydroxybenzoic acid, and we could not confirm any dicamba.
Original language | English (US) |
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Pages (from-to) | 115-121 |
Number of pages | 7 |
Journal | ACS Symposium Series |
Volume | 699 |
DOIs | |
State | Published - 1998 |