Table 1. The yields, pH values, chemical compositions and atomic ratios of biochars produced from E. crassipes at different pyrolytic temperatures.

Biochar	Yield/%	pH	Ash/%	C/%	H/%	N/%	O/%	(O+N)/C	O/C	H/C
WH300	46.59	7.98	15.89	47.17	3.58	2.12	47.13	0.788	0.749	0.911
WH500	34.97	10.96	27.18	53.39	1.99	1.82	42.80	0.630	0.601	0.447
WH700	28.20	11.54	37.25	51.34	1.10	0.73	46.83	0.696	0.684	0.257