Transforming Volcanic Ash into Agricultural Resource in Sicily

In the Sicilian town of Giarre, located near Mount Etna, farmers are increasingly utilizing volcanic ash as a natural fertilizer. Andrea Passanisi, a producer of tropical and citrus fruits, has adopted this unconventional approach on his 100-hectare farm. Historically, the ashfall from Mount Etna, which averages 12,000 tonnes daily, was seen as a hindrance, polluting irrigation systems and requiring extensive cleanup efforts. However, a five-year study by the University of Catania has highlighted the potential benefits of volcanic ash in agriculture, prompting a shift in perspective among local farmers.

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Farmers like Emilio Sciacca, who owns a vineyard in Linguaglossa, have found that leaving volcanic ash on their fields enhances soil drainage and fertilization. Sciacca describes Etna's ash as "a gift for us producers that literally falls from the sky," emphasizing its value in the unique geological context of the region. The ash contains beneficial minerals such as iron, aluminum, and silica, which contribute to healthier crops. This newfound appreciation for volcanic ash represents a significant change in how farmers view the natural resource.

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Despite the promising results from informal use, regulatory barriers hinder the official commercial application of volcanic ash. According to Paolo Roccaro, an environmental engineering professor, European legislation classifies volcanic ash as municipal waste, requiring costly disposal methods. The disposal cost can reach €300 per tonne, while recycling it for agricultural use could reduce this to €30. Although regional guidelines for ash reuse were published in 2024, there remains a lack of registered companies to facilitate the collection and refinement of volcanic ash for agricultural purposes.

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The benefits of volcanic ash are not limited to Sicily. In Iceland, farmers have also recognized its agricultural advantages. Thórarinn Ólafsson, a wheat farmer, noted that crops left untouched during ash removal showed improved quality, linking this to the volcanic ash from the Eyjafjallajökull eruption in 2010. Similarly, Icelandic ceramist Guðbjörg Káradóttir incorporates volcanic ash into her porcelain, viewing it as a cultural heritage element rather than waste.

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As Sicilian farmers await the formalization of ash reuse, local initiatives are emerging. Nilla Zaira D’Urso, an art curator, has begun transforming volcanic ash into souvenirs, demonstrating a grassroots effort to repurpose the material. The sentiment among local stakeholders is shifting towards embracing volcanic ash as a resource rather than a burden.

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Roccaro emphasizes the need for a systemic approach to manage volcanic ash, stating, “It is intended for special disposal at authorized landfills, which entails significant costs for municipalities.” The ongoing efforts aim to instill the idea that volcanic ash can be a valuable resource in agriculture.

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• “It allows us to use fewer chemicals, which makes fertilising cheaper and more sustainable, respecting the equilibrium of nature without abusing it,” — Andrea Passanisi, Farmer

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• “Etna’s ash represents an added value for volcanic soils, a gift for us producers that literally falls from the sky,” — Emilio Sciacca, Vineyard Owner

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• “We need to make the best of any scrap material instead of seeing everything as a burden,” — Nilla Zaira D’Urso, Art Curator

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• “It’s true it can be an insidious guest, but it’s better to make the coexistence work, to turn ash into an ally rather than fighting it.” — Unattributed Local Perspective

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The transformation of volcanic ash from a nuisance to a resource reflects a broader trend in sustainable agriculture, with potential implications for both local economies and environmental practices.

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