Effects of biochar and alkaline amendments on cadmium immobilization, selected nutrient and cadmium concentrations of lettuce (Lactuca sativa) in two contrasting soils

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Table 1 Selected properties of the soils

Soil	pH (H₂O)	EC (dS/m)	Exchangeable cations [cmol₍₊₎/kg]					CEC [cmol(+)/kg]	Total Cd (mg kg⁻¹)	Total C (g kg⁻¹)	Total N (g kg⁻¹)	Particle size
Soil	pH (H₂O)	EC (dS/m)	Ca	Mg	K	Na	Al	CEC [cmol(+)/kg]	Total Cd (mg kg⁻¹)	Total C (g kg⁻¹)	Total N (g kg⁻¹)	% Sand	% Silt	% Clay
PK^a	6.71	0.024	24	6.7	0.9	0.4	<0.02	32.2	2.58	19	1.8	19.1	73.6	7.2
BA^a	6.86	0.006	4.2	1.1	0.3	0	<0.02	5.83	0.3	3.2	0.4	54.1	38.2	7.5