Fig 4. Terbuthylazine removal from soil microcosms upon bioaugmentation with ammonium-grown Arthrobacter aurescens TC1 inocula.

Time-course (in days, d) variation of terbuthylazine concentration in soil microcosms contaminated with (A) fresh or (B) four month-aged Terbutilazina-Sapec (both at 10× the recommended field dose for weed control in corn cultivation) and bioaugmented (at day zero) with viable cells of A. aurescens TC1 at the following initial inoculum densities: 5 × 10⁷ (△), 8 × 10⁷ (□), 2 × 10⁸ (▲), or 8 × 10⁸ (■) cfu g^-1 dry weight of soil. Terbuthylazine concentration measured in the non-bioaugmented soil is also shown (●). Error bars represent ± 1 standard deviation.