Fig. 1. Concentration of the 16 USEPA PAHs in (A) aerial parts of lettuce, potato, and carrot, (B) roots of lettuce, and (C) storage organs of potato and carrot, after growth in soils showing a gradient of PAH concentration (PAH₁ to PAH₅). Bars are mean values of five replicates. Bars affected by the same letter are not significantly different at the 5% probability level (Tukey's test).

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