Three seeds each of maize or cowpea were planted into each of the pots. There were three replicates of each soil type and test crop laid out in completely randomized design. The seedlings were thinned to one per pot at one week after planting (WAP. Watering was done as necessary. The seedlings were allowed to grow for 6 weeks. Growth parameters assessed on maize and cowpea plants were plant height and number of leaves produced. The shoots of the test crops were cut at ground level with a sharp knife put in well labeled envelopes and dried in the oven at 75˚C for 72 hrs for dry matter determination. The dried samples were milled and taken to the laboratory for phyto-extraction and measurement of heavy metals in their tissues. Vegetations samples that were collected from the polluted and unpolluted sites were also treated as above. No fertilizer or pesticide was applied throughout the whole of experimental period. All samples analysed for heavy metals were digested and were then read from an Atomic Absorption Spectrophotometer (AAS) Milton Roy 2ID using their respective lamp and wavelengths. Calculation was done using: