However, it remains unknown to what extent the original biomass
material and the particle size of biochar can influence the effect on
immobilization and phytoavailability of contaminant metals in
soils, and what the predominating mechanisms are for such processes. To address this, this study investigates the influence and
mechanisms of biochar amendments on the phytoavailability of
contaminant metals to rice-plants grown in a historically contaminated soil