From: Heavy metals bioaccumulation in Berseem (Trifolium alexandrinum) cultivated in areas under intensive agriculture, Punjab, India
Chromium (mg/kg)
Copper (mg/kg)
Cadmium (mg/kg)
Cobalt (mg/kg)
Lead (mg/kg)
Maximum permissible limits for soil
Indian (Awashthi 2000)*
–
135–270
3–6
250–500
European Union (2002)
150
140
3.0
300
Maximum permissible limits for fodder
CERSPC (2009)
10.0
0.5
5.0