Volcanic rock flour is an excellent soil amendment since it encourages ideal soil porosity with a positive influence on the water and nutrient cycles. It can also help root development. The improved underground development of plants leads to an increase in organic matter in the medium-term, expanding the positive effects in terms of water retention and carbon storage. Rock flour accelerates the process of soil formation. It is limited to nursery use in viticulture. The rock flour is best obtained from mining waste. If this type of material is mined on purpose, it is regrettable and uneconomic.
