Losses of terbuthylazine and alachlor from agricultural fields. Part II: Mass balance and modeling

Dissipation of terbuthylazine and alachlor was studied in a two year field trial. Air, soil and water samples were collected up to 142 and 92 days after application respectively in the two years. A mass balance is done in order to quantify the different dissipation patterns. Comparison between the experimental data and those predicted by a multimedia fugacity-based model (SoilFug) demonstrates the good predictive capability of the model, even of volatilization losses are probably underestimated.