Fig. 1.

Easily extractable (EAS, upper panel) and accelerated solvent-extractable (ASE, middle panel) concentrations as well as nonextractable residues (NERs) (lower panel) of difloxacin (DIF) and sarafloxacin (SAR) in the laboratory trial. Data points and error bars represent the mean of four replicates ± SE. Dashed-dotted horizontal lines in the upper and middle panel represent the routine limit of quantification; solid and dashed curves in the middle panel represent fitted dissipation curves.

 


Fig. 2.

Accelerated solvent-extractable (ASE) fraction of difloxacin (DIF) and sarafloxacin (SAR) as percent of the applied amount in the laboratory trial, mesocosm, and field trial. Data points and error bars represent the mean of four replicates ± SE.

 


Fig. 3.

Difference between antibiotic concentrations in rhizosphere soil (RS) and bulk soil (BS) as percent of bulk soil concentrations in the mesocosm and field trial. Data points and error bars represent the mean of four replicates ± SE.

 


Fig. 4.

Time course of potential nitrification activity (A) and potential denitrification activity (B) in bulk soil in the field trail. Data points and error bars represent the mean of four replicates ± SD.