Treatments Roots Stems Leaves Soil+2.5% oil+TL 15.1 10.9 ND Soil+2.5% oil+SC 16.5 12.2 6.3 Soil+2.5% oil+PS 12.2 8.2 4.2 Soil+2.5% oil 3.4 1.8 ND Soil without oil 1.4 ND 0.08 ND: Not detected

Table 3: Zn (mg/Kg) contents in plants in soil contaminated with 80 ppm Zn.