Fig. 2. Relationship between As concentration in lettuce dry matter (mg kg-1) and soil concentration of added Fe oxides (%), for each pot of the treatment combinations F0L0, F1L1, F2L2, and F3L3, and the fitted exponential curve (Eq. [2]).
Fig. 2. Relationship between As concentration in lettuce dry matter (mg kg-1) and soil concentration of added Fe oxides (%), for each pot of the treatment combinations F0L0, F1L1, F2L2, and F3L3, and the fitted exponential curve (Eq. [2]).