Figure 4.

Percentages of ¹⁴C-metribuzin sorbed (a) and desorbed (b) from the nanoMTZ and MTZ formulations applied to soils (clay, SL-1, and SL-2). Bars represent the mean ± standard error of the mean (n = 2) of each factor (soil and formulation) separately. Different lowercase letters indicate significant differences among the soils, while asterisks represent significant differences among the formulation types by Tukeyʼs test (p < 0.05). The interaction of factors was not significant according to the variance test (F > 0.05).