This Technical Specification specifies a method for the extraction of total calcium, total magnesium and total
sodium and for the extraction of total sulfur present in the form of sulfates, so that the same extract may be
used for the determination of each nutrient required.
The method is applicable to fertilizers listed in Regulation (EC) 2003/2003, Annex I (see [1]), for which a
declaration of total calcium, total magnesium, total sodium, and total sulfur in the form of sulfates is provided
for in this Regulation.