Grand Est
In 1904, potassium deposits were discovered in French Alsace. Potassium, or potash, is one of the most essential nutrients for plants, together with nitrogen and phosphorus. That is why potash was exploited to make fertilizer.
Carreau Rodolphe
One of the most exceptional mining complexes in French Alsace, where potassium or potash was brought to the surface, is the Carreau Rodolphe.
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