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Biochar is a solid, charcoal-like material formed by heating biomass in the absence of oxygen in a process known as pyrolysis. Though not a fertilizer, biochar – when applied to soil – boosts fertility by helping to retain water in the soil when it is dry, and it helps to promote drainage when conditions are wet and retain soil nutrients. This kiln can transform over 100 pounds of waste an hour, and it is agile enough to allow rapid testing of different inputs and production conditions.