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Biochar can greatly improve the soil and make it permanently fertile if you mulch at the same time and carry out other measures to improve the soil. Activate charcoal and make it yourself. Advertising: Biochar: https://borago.de/produkt/1995-Bio-Pf... Miracle soil: https://borago.de/produkt/1994-Wunder... Liquid fertilizer with charcoal: https://borago.de/produkt/974-Wunderg... 00:00 Everything about Terra Preta and biochar 08:23 Practical applications with Terra Preta