Impacts of Biochar on Physical Properties and Erosion Potential of a Mudstone Slopeland Soil

Table 1

General properties of the studied soil and the biochar.

Properties	Soil	Rice hull biochar
Sand (%)	7.90 ± 1.20^a	ND
Silt (%)	58.6 ± 5.30	ND
Clay (%)	33.5 ± 2.70	ND
pH	8.70 ± 0.05	7.90 ± 0.02
SOC (%)	0.49 ± 0.05	3.27 ± 0.05
Total carbon (%)	3.35 ± 0.53	33.0 ± 0.61
Total nitrogen (%)	0.06 ± 0.02	0.41 ± 0.03
CaCO3 (g/kg)	22.1 ± 1.29	4.56 ± 0.53
CEC (cmol kg^−1)	9.83 ± 0.27	26.0 ± 1.13
Ca (cmol kg^−1)	26.2 ± 1.18	2.44 ± 0.18
Na (cmol kg^−1)	1.58 ± 0.07	1.26 ± 0.35
Mg (cmol kg^−1)	0.63 ± 0.03	1.91 ± 0.44
K (cmol kg^−1)	0.37 ± 0.03	18.7 ± 0.30
SSA (m^2 g^−1)	ND	15.1

ND: not determined; SOC: soil organic carbon estimated by wet oxidation method; CEC: cation exchange capacity; Ca, Mg, K, and Na were determined as the exchangeable forms; SSA: specific surface area.
standard deviation.