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Effect of 3 years of phytoremediation on soil physical and chemical parameters, including pH (A), EC (B), TN (C), AN (D), NN (E), TP (F), AP (G), and SOM (H). The bars with different letters are significantly different (P < 0.05), and the results were obtained from one-way ANOVA. The first letter of the sample ID indicates the root compartment (R, rhizosphere soil; N, bulk soil).
