Input materials*

TC (%)

TN (%)

CC

41.52 ± 0.68

0.95 ± 0.05

PC

34.45 ± 0.42

2.29 ± 0.06

Rice hull

36.47 ± 0.41

0.37 ± 0.03

Bio-char based rice hull

43.97 ± 0.86

1.73 ± 0.02