Metal

Soil fertilization, land reclamation

Agro-technical composting. Drainage and reclamation

Agricultural exploitation

Non-agricultural exploitation

mg/kg d.m.

Lead (Pb)

500

1000

1500

Cadmium (Cd)

10

25

50

Chromium

500

1000

2500

Copper (Cu)

800

1200

2000

Nickel (Ni)

100

200

500

Mercury (Hg)

5

10

25

Zinc (Zn)

2500

3500

5000