Influence of Gliricidia sepium Biochar on Attenuate Perchlorate-Induced Heavy Metal Release in Serpentine Soil

Figure 1

Effect of different rates of BC amendments on bioavailability of heavy metals, (a) Ni and (b) Mn. Letters (A, B, C, and D) within a single graph indicate whether the means significantly differ from each other. Means topped with the different letter differ significantly () and vise versa.

(a)

(b)