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. 2019 May 9;16(9):1624. doi: 10.3390/ijerph16091624

Figure 4.

Figure 4

Effect of Si on the fractions of Cd in soil for (a,c,e,g) P. glaucum × P. purpureum and (b,d,f,h) P. glaucum. (a,b) Exchangeable Cd. (c,d) Reducible Cd. (e,f) Oxidizable Cd. (g,h) Residual Cd. Values followed by the different letters indicate significant differences between the different treatments of the same variety, according to one-way ANOVA followed by the Duncan test (p < 0.05).