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Division 1 A straight solid inorganic macronutrient fertiliser shall have a declared content of:

United Kingdom

Original text. Later amendments are not shown.

  1. (a)

    only one macronutrient (nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sodium (Na), sulphur (S)), or

  2. (b)

    only one primary macronutrient (nitrogen (N), phosphorus (P), potassium (K)) and one or more secondary macronutrients (calcium (Ca), magnesium (Mg), sodium (Na), sulphur (S)).