Research, Policy and Practice
Table 6 Heavy metal contents and their sources in various countries (mg kg−1)
From: Benefits, concerns and prospects of using goat manure in sub-Saharan Africa
Country | Source | Heavy metal content (mg/kg) | ||||
|---|---|---|---|---|---|---|
Cd | Cu | Ni | Pb | Zn | ||
Korea | Composted cow manure | 0.5 | 10 | 4 | 21 | 21 |
Composted sine manure | 1.1 | 466 | 11 | 38.2 | 566 | |
Spain | Composted cattle manure | 0.8 | 35 | - | 9.8 | 142 |
Poultry | Â | 14 | 37 | 18 | 94 | |
UK | Beef cattle farmyard | 0.13 | 16.4 | 2.0 | 1.95 | 81 |
Dairy cattle farmyard | 0.38 | 97.5 | 3.7 | 3.61 | 153 | |
Pig farmyard | 0.37 | 374 | 7.5 | 2.94 | 575 | |
Layer manure | 1.06 | 64.8 | 7.1 | 8.37 | 459 | |
Canada | Poultry | 0.48 | 54.3 | 7 | 2.3 | 550 |
Italy | Farmyard | 6.0 | 66 | 14 | 60 | 340 |
Venezuela | Goat | 1 | 13 | 4.4 | 3.7 | 71 |
Tunisia | Cow | 0.7 | 26 | 22 | 10 | 120 |
Farmyard | 2.10 | 22.5 | 22.4 | 8.9 | 117 | |
Poultry |  < 4 | 34 |  < 88 |  < 44 | 75 | |