The presence of plant nutrients and ash in the biochar, high
surface area and porous nature of the biochar and the
capacity of biochar to act as a medium for microorganisms
are identified as the main reasons for the increase in soil
properties and highest nutrient uptake at biochar treated
soils. Moreover, due to high Cr adsorption capacity of
biochar produced from maize stalk, the concentrations of
Cr in lettuces tissues were reduced by addition of biochar.