NF U42-771

Fertilizers. Determination of the sulfuric anhydrique content total and soluble.

Cette norme définit une méthode de détermination de l'anhydride sulfurique dans les matières fertilisantes dont la mention de la teneur est obligatoire pour certaines dénominations types définies dans les normes de spécification. Elle est donc à l'usage des producteurs et des organismes officiels de contrôle.

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