engrais potassique

CONT: Les engrais potassiques sont : soit des sels bruts (sylvinite); soit des sels raffinés (chlorure de potassium, carbonate de potassium).

CONT: All potassium fertilizers are water soluble. Difference in their value and uses depend on the type of ion accompanying the potassium.
OBS: ... come(s) largely from deposits of potassium chloride. Manufacturers mine the deposits or extract them with water to produce such fertilizers as potassium chloride, potassium nitrate, and potassium sulfate.