Table 4 Chemical composition methods.
Research parameter | Research method and standards |
|---|---|
pH | Potentiometric |
Organic carbon (C), % | ISO 10694:1995 |
Nitrogen (N), mg kg−1 | LST EN ISO 16948:2015 |
Phosphorus (P), mg kg−1 | LST EN ISO 16967:2015, LST ISO 6878–1998 |
Potassium (K), mg kg−1 | LST EN ISO 16967:2015, LST ISO 9964–3:1998 |
Cadmium (Cd), mg kg−1 | LST EN ISO 16968:2015, LST EN ISO 15586:2004 |
Zinc (Zn), mg kg−1 | LST EN ISO 16968:2015, LST ISO 8288:2002 |
Copper (Cu), mg kg−1 | |
Nickel (Ni), mg kg−1 | LST EN ISO 16968:2015, LST EN ISO 11885:2009 |
Lead (Pb), mg kg−1 | |
Chrome (Cr), mg kg−1 |
