Table 6.
Combined effect of inorganic amendments and enriched municipal solid waste composton heavy metal and micronutrient contents in soil surface (0-15 cm).
| Treatments | Co (ppm) | Cr (ppm) | Pb (ppm) | Cu (ppm) | Fe (ppm) | Mn (ppm) | Zn (ppm) |
|---|---|---|---|---|---|---|---|
| T1: control (no amendments) | 0.667 | 0.065 | 0.135 | 3.72 | 21.12 | 7.12 | 0.57 |
| T2: gypsum @ 50% G.R | 0.651 | 0.065 | 0.132 | 3.22 | 20.36 | 6.70 | 0.63 |
| T3: un-enriched MSW compost @10 t ha−1 | 0.507 | 0.063 | 0.146 | 2.98 | 25.96 | 6.92 | 1.13 |
| T4: enriched MSW compost @10t ha−1 | 0.467 | 0.059 | 0.134 | 2.90 | 28.53 | 6.60 | 1.05 |
| T5: gypsum @ 25%G.R. + un-enriched MSW compost @ 10 t ha−1 | 0.463 | 0.069 | 0.167 | 2.56 | 22.96 | 4.25 | 1.05 |
| T6: gypsum @ 25% G.R. + enriched MSW compost @ 10 t ha−1 | 0.432 | 0.064 | 0.178 | 2.32 | 20.36 | 3.89 | 1.13 |
| Initial | 0.760 | 0.070 | 0.113 | 3.18 | 13.64 | 7.62 | 0.77 |
| LSD (P = 0.05) | 0.04 | ns | 0.003 | 0.34 | 1.12 | 1.11 | 0.04 |
LSD least significant difference, ns non-significant.