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Slash and Char
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Charcoal is influencing soil quality in manifold ways, most importantly by reducing available Al and reducing acidity. Furthermore, charcoal has the potential to reduce N leaching and adds potassium (K) to the soil. The effects of charcoal on soil biological, chemical and physical properties are complex, making it difficult to isolate single significant charcoal effects, but added up charcoal amendments caused a significant increase in crop production.
Left charcoal + mineral fertilizer; Right mineral fertilizer without charcoal
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