Zinc Concentrations (ppm) in the Ashed Leaves
                                              of the Plants Determined by Atomic Absorption
                                              Analyses
Red = Soil with 500 ppm metal
Green = Soil with 300 ppm metal
Blue = Soil with 100 ppm metal

 
Zn ppm

 
                                 C4,5,6                 Zn1,3,5                        Cd1,3,5                      Pb1,3,5

                                        Sample  Numbers
                                                                  
Mean Concentration of Zn;
in the control samples = 325 ppm
in the samples grown in Cd enriched soil = 268 ppm
in the samples grown in Pb enriched soil = 329 ppm