Table 5.
The distribution of trace metals and micronutrients in schemes of Usangu basin Southern Highland Tanzania.
| Irrigation Scheme | Cu (mg/kg) | Co (μg/kg) | Cr (μg/kg) | Mo (μg/kg) | Ni (μg/kg) | |
|---|---|---|---|---|---|---|
| Mean | Chimala | 2.29 | 699.57 | 101.46 | ND | 1086.71 |
| Igalako | 0.55 | 572.35 | 26.14 | 2.25 | 244.42 | |
| Ihahi | 0.81 | 489.30 | 13.46 | 11.80 | 110.46 | |
| Ilaji | 1.53 | 291.19 | 46.08 | ND | 134.54 | |
| Isenyela | 0.31 | 325.74 | 6.09 | 16.44 | 93.28 | |
| Kapunga | 1.83 | 631.04 | 39.60 | 0.72 | 307.89 | |
| Mabadaga | 2.11 | 912.72 | 99.03 | 1.35 | 1770.17 | |
| Mahangole | 0.68 | 455.84 | 13.49 | 5.67 | 74.14 | |
| Mubuyuni | 3.44 | 987.06 | 84.92 | 0.18 | 1278.17 | |
| Uturo | 4.14 | 1619.78 | 55.81 | 3.45 | 799.26 | |
| Minimum | Chimala | 2.06 | 666.77 | 89.27 | 0.00 | 1048.16 |
| Igalako | 0.23 | 365.44 | 9.29 | 0.00 | 53.34 | |
| Ihahi | 0.53 | 164.21 | 1.17 | 0.00 | 84.45 | |
| Ilaji | 0.15 | 135.99 | 10.95 | 0.00 | 49.00 | |
| Isenyela | 0.10 | 321.38 | 0.95 | 14.92 | 86.08 | |
| Kapunga | 0.48 | 45.16 | 6.93 | 0.00 | 25.22 | |
| Mabadaga | 1.96 | 838.51 | 92.37 | 0.00 | 1708.89 | |
| Mahangole | 0.03 | 280.16 | 0.00 | 0.00 | 34.70 | |
| Mubuyuni | 1.22 | 409.28 | 18.26 | 0.00 | 170.66 | |
| Uturo | 3.10 | 752.11 | 40.09 | 0.00 | 520.92 | |
| Maximum | Chimala | 2.55 | 719.95 | 107.82 | ND | 1112.72 |
| Igalako | 0.97 | 883.46 | 48.84 | 7.34 | 510.18 | |
| Ihahi | 1.27 | 1045.42 | 52.60 | 65.87 | 175.73 | |
| Ilaji | 2.96 | 468.57 | 85.74 | ND | 216.22 | |
| Isenyela | 0.51 | 332.78 | 9.19 | 18.28 | 102.22 | |
| Kapunga | 4.12 | 1728.17 | 97.86 | 7.67 | 725.18 | |
| Mabadaga | 2.30 | 1023.17 | 102.92 | 3.23 | 1883.60 | |
| Mahangole | 1.11 | 647.26 | 27.04 | 22.11 | 110.20 | |
| Mubuyuni | 7.21 | 1822.17 | 222.78 | 2.18 | 4497.32 | |
| Uturo | 5.96 | 2684.30 | 68.74 | 13.03 | 1299.45 |
ND; means not detected.