for the TOC and C/N ratio. There were no significant differences in
the NO
3 N content among treatments. The NH
þ
4N=NO
3N
ratio for the BIO treatment was highest compared to the other
treatments. The TOC content was highest for the CMR treatment,
followed by the GCK, CM, PM and BIO treatments. The TON content
for the PM treatment was lower than the other treatments but
displayed the highest C/N ratio, followed by the CM, CMR, GCK and
BIO treatments. Significant differences in pH values were observed
among the treatments; the BIO treatment significantly improved
the soil pH, followed by the PM, GCK, CM and CMR treatments.