Table 1.

Physicochemical properties of black soils obtained from northeast China.

Soil type	Textural class (USDA)	pH	TOC g/kg	CEC cmol(+)/kg	TN g/k	TP g/kg	Particle fraction (%)
							Clay	Silt	Sand
Mollisols	Silty clay loam	6.01 ± 0.04	36.79 ± 0.84	37.5 ± 1.1	2.98 ± 0.23	2.56 ± 0.14	38.1 ± 0.1	54.6 ± 0.2	7.3 ± 0.1

TOC, The total organic carbon; CEC, Cation exchange capacity; TN, Total nitrogen; TP, Total phosphorus.