Table 1. Selected properties of biomass and biochars.

	Wheat straw	BC	H3PO4-BC	PRT-BC	TSP-BC
pH	6.01	7.77	1.51	8.04	3.89
C (%)	46.8a	69.1	28.3	29.8	40.8
H (%)	0.151	0.285	0.023	0.655	0.541
N (%)	0.329	0.691	0.227	1.97	2.03
O (%)	41.5	11.6	29.6	7.84	14.3
P (%)	0.112	0.116	12.5	5.98	6.78
Yield (%)	-	31.7	56.9	54.4	46.9
ASH (%)	4.35	27.1	25.2	69.3	51.9
VS (%)	78.6	13.0	57.6	12.8	12.0
FC (%)	17.1	59.9	17.2	17.9	36.1

PRT: phosphate rock tailing; TSP: triple superphosphate; TC: total carbon; VS: volatile solid; FC: fixed carbon. ^a Mean value (n = 3)