Table 2.
Toxic elements concentration (mg/kg) in Landmark University farm (n = 8).
| Elements | Crustal Average (1964) |
L1 | L2 | L3 | L4 | L5 | L6 | L7 | L8 |
|---|---|---|---|---|---|---|---|---|---|
| As | 1.5 | 4.3 | 2.6 | 4.2 | 4.6 | 4.6 | 4.3 | 2.0 | 1.2 |
| Cd | 0.1 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.12 | 0.09 |
| Co | 17.0 | 6.10 | 5.10 | 5.5 | 6.6 | 6.20 | 6.50 | 17.4 | 9.70 |
| Cr | 83.0 | 56.0 | 55.0 | 60.0 | 67.0 | 72.0 | 71.0 | 58.0 | 38.0 |
| Cu | 25.0 | 19.3 | 16.4 | 22.2 | 22.0 | 21.2 | 23.9 | 24.5 | 16.8 |
| Mn | 600 | 360 | 292 | 402 | 329 | 393 | 323 | 1137 | 554 |
| Ni | 44.0 | 21.4 | 17.3 | 21.9 | 25.0 | 21.8 | 26.1 | 19.7 | 12.3 |
| Pb | 17.0 | 18.46 | 15.58 | 19.37 | 19.73 | 19.22 | 21.3 | 49.9 | 36.5 |
| Zn | 71.0 | 28.6 | 23.2 | 29.5 | 30.1 | 28.7 | 34.1 | 156.9 | 96.0 |
N/A-Not Available.