Table 4 Ultimate analysis of eggplant and Acacia nilotica bark derived biochars.

300 °C

eggplant

61.9^a

2.50^e

13.8^c

3.91^b

24.7^a

0.018^d

0.005^bc

Acacia nilotica bark

71.31^d

0.351^a

25.8^e

3.87^b

203.1^d

0.030f.

0.004^c

600 °C

eggplant

64.9^b

1.92^c

6.25^a

1.82^a

33.8^b

0.008^b

0.002^a

Acacia nilotica bark

89.8^e

0.376^a

4.9^a

2.28^a

238.8^e

0.004^a

0.002^a