Fertilisers Regulation, Annex I, A - E.1, E2.4 and G, Annex II

This list contains Annex I fertiliser types according to their specific characteristics, and Annex II associated tolerances. Regulation 2003/2003/EC consolidates all European Union rules that apply to fertilisers, and ensures that the technical requirements it outlines are implemented uniformly. The Regulation only applies to mineral fertilisers consisting of one or more plant nutrients.

Ref No.
Annex Section
C Inorganic fluid fertilisers
Minimum content of nutrients (percentage by weight). Data on the expression of nutrients. Other requirements NPK Minimum content
20 % by weight
NPK Expressed as
As total N + P2O5 + K2O
Other Requirements
At least 25 % of the declared content of total nitrogen must derive from nitrogen form (5)

At least 3/5 of the declared nitrogen content (5) must be soluble in hot water

Max. biuret content
(ureic N + urea formaldehyde N) x 0,026
N Minimum content
5 % by weight
N Expressed as
As total nitrogen
K Minimum content
4 % by weight
K Expressed as
As K2O
P Minimum content
4 % by weight
P Expressed as
As P2O5
Nutrient declaration
(1) Total nitrogen (2) Nitric nitrogen (3) Ammoniacal nitrogen (4) Ureic nitrogen (5) Nitrogen from urea formaldehyde

(1) Water-soluble P2O5 (2) P2O5 soluble in neutral ammonium citrate (3) P2O5 soluble in neutral ammonium citrate and in water

Water-soluble K2O

Other data
Total nitrogen

If any of the forms of nitrogen (2), (3) and (4) amounts to not less than 1 % by weight, it must be declared

Nitrogen from urea formaldehyde

If the biuret content is less than 0,2 %, the words 'low in biuret' may be added

The fertilisers must not contain Thomas slag, aluminium calcium phosphate, calcined phosphates, partially solubilised phosphates or rock phosphates (1) If the water-soluble P2O5 is less than 2 %, only solubility (2) shall be declared (2) If the water-soluble P2O5 is at least 2 %, solubility (3) and the water- soluble P2O5 content shall be declared

Water-soluble potassium oxide

The words 'low in chloride' may be used only where the Cl content does not exceed 2 %

The chloride content may be declared

Physical form
C.2 Compound fluid fertilisers
Production and Ingredients
Product in liquid form, in which the nutrients are derived from substances both in solution and in suspension in water, without addition of organic nutrients of animal or vegetable origin and containing urea formaldehyde
Type designation
NPK-fertiliser suspension containing urea formaldehyde

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