Property Mine soil Biochar
pH 8.50 8.35
SOC 620 2.12×105
TN 300 6840
C/N 2.07 31.0
AN 18.23 62.71
AP 1.85 127.63
AK 51.87 2970.0
Cu 9.92 -
Zn 66.7 -
Pb 23.5 -
Cd 0.21 -
Cr 44.9 -