Soil Decontamination
Soil contaminants can include salts, accumulation of pesticides, spilled fuels, solvents, concrete, etc. you name it can be toxic if excess of plant toleration.
Activated carbon is added to the soil which will adsorb contaminants taking it away from the soil particles and away from the plant roots. This can also help aid moisture retention in the soil during drought conditions, and claims to aid in microbial soil life.