Table 3.

The calculated ratio (R) values of the DGT-measured concentrations (C_DGT) of Cd to soil solution concentrations (C_sol) of Cd with increasing addition of colza cake in soils.

Colza Cake Levels in Soil (g·kg−1)	Wheat	Maize
CK	0.83	0.85
0	0.73	0.74
5.0	0.71	0.69
10.0	0.67	0.68
20.0	0.63	0.65
40.0	0.51	0.52
60.0	0.37	0.29
80.0	0.31	0.21
100.0	0.27	0.16

CK represents the control group, R = C_DGT/C_sol.