# The Fertilisers Regulations 1990, Paragraph 6


The content declared in accordance with paragraph 1(d) shall be indicated both in words and by the appropriate chemical symbol as follows:—
(a) Nitrogen (N);
(b) Phosphorus pentoxide (P2O5);
(c) Potassium oxide (K2O);
(d) Magnesium oxide (MgO);
(e) Chlorine (Cl).

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Source: https://www.legislation.gov.uk/uksi/1990/887/schedule/2/paragraph/6 (the official version)
Page: https://openlegislation.uk/fertilisers-regulations-1990/schedule-2/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.