The remediation factor (RF) was calculated to estimate the phytoextraction efficiency of heavy metals (Vyslouˇzilov´ a et al., 2003), representing the percentage of an element removed by the plant dry aboveground biomass from the total element content in the soil during one cropping season (Neugschwandtner et al., 2008). The translocation factor (TF), which evaluates the capacity of a planttotransfermetalsfromroottoabovegroundpart, was calculated as the ratio of the metal concentration in aboveground part to that in root (Usman and Mohamed, 2009).