Publisher's Synopsis
Excerpt from Les Engrais, Vol. 3: Engrais Potassiques, Engrais Calcaires, Engrais Divers, Engrais Composes; Achat, Transport, Contr�le, Exp�rimentation des Engrais
Le plus souvent ce ne sont pas les cendres en na ture qu'on emploie, mais les r�sidus des diff�rentes industries travaillant les mati�res v�g�tales. La fabri cation du sucre, de l'alcool, de la f�cule, laisse comme d�chets des solutions riches en sels potassiques, qu'on peut extraire par des traitements appropri�s.
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