Table 2.

Chemical composition of biochar and poultry manure used in the experiment.

Property	Biochar	Poultry manure
Bulk density (Mg m−3)	0.32	ND
Specific surface area (m2 g−1)	2.83	ND
pH (water)	8.32	6.85
Ash content (%)	0.48	12.2
Organic C (%)	58.3	22.5
Total N (%)	0.65	2.88
C:N	89.7	7.8
Available P (%)	0.73	1.30
Exchangeable K (cmol kg−1)	1.95	1.46
Exchangeable Ca (cmol kg−1)	2.61	1.52
Exchangeable Mg (cmol kg−1)	1.14	0.61
Electrical conductivity (dS m−1)	2.60	0.95