Table 7.4 - Main anthropogenic sources of diffuse pollution by heavy metals to agricultural land
  | Cadmium | Copper | Lead | Zinc |
---|---|---|---|---|
Atmospheric deposition (local and regional) | + | + | +++ | + |
Pesticides | | +/++1 | | +/++1 |
Manure | + | ++ | + | ++ |
Mineral fertilisers and liming | +++ | +/++1 | + | + |
Sewage sludge | + | + | + | + |
Notes: no contribution, + slight contribution, ++ moderate contribution, +++ high contribution.