# Regulation (EC) No 2003/2003 of the European Parliament and of the Council of 13 October 2003 relating to fertilisers (Text with EEA relevance), Article 18: Calcium, magnesium, sodium and sulphur

Extent: E+W+S+N.I.

1. The declaration of the magnesium, sodium and sulphur content of the fertilisers listed in sections A, B, and C of Annex I shall be expressed in one of the following ways:
(a) the total content expressed as a percentage of the fertiliser by mass;
(b) the total content and the content soluble in water, expressed as a percentage of the fertiliser by mass where the soluble content is at least a quarter of the total content;
(c) where an element is totally soluble in water, only the content soluble in water shall be declared as a percentage of the mass.
2. Unless otherwise stated in Annex I, a declaration of the calcium content shall only be made if it is soluble in water and shall be expressed as a percentage of the fertiliser by mass.

---
Source: https://www.legislation.gov.uk/eur/2003/2003/article/18 (the official version)
Page: https://openlegislation.uk/eu-regulation-2003-2003/article-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.