*2.8. Statistical Analysis*

All experiments were performed in triplicate and the results are presented as mean values ± standard deviations. Basic statistics were completed by using Microsoft Office Excel Microsoft, Redmond, Washington, DC, USA), and all the others were performed with STATISTICA StatSoft (New York, NY, USA). The Student's *t*-test was performed to reveal the differences between the values obtained for background and experimental soils (*p* < 0.05).
