C N P Modified fly-ash amendment Ctrl 3.65 ±0.03a 3.67 ±0.03b 4.81 ±0.70b 3.92 ±0.01b DBM1a 3.39 ±0.01a 6.83 ±0.02a 6.50 ±0.04a 5.06 ±0.02a DBM2b 3.86 ±0.02a 6.72 ± 0.11a 6.42 ±0.05a 5.18 ±0.06a

aDBM1, Arthrobacter sp.; bDBM2, Bacillus sp.; Data are presented as the mean ± SD (n=3). Values with different lowercase letters in the same column are significantly different (P <0.05).

Table 4: Soil pH after addition of nutrient sources and modified amendment.