Fig. 3. Predicted Cd concentration in wheat (mg kg^–1 dry weight): (A) 5th percentile, (B) median, and (C) 95th percentile of 1000 simulated Cd concentrations per node. (D) Safe areas, that is, areas where 95th percentile is below the food quality standard of Cd in wheat (0.235 mg kg^–1 dry weight).