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
A Inorganic straight primary nutrient fertilisers
Minimum content of nutrients (percentage by weight). Data on the expression of nutrients. Other requirements Nutrient (a) Minimum content
3 % by weight
Nutrient (a) Expressed as
As N
Other nutrient (a)
Ammoniacal and/or nitric and/or ureic nitrogen
Other Requirements
At least 1/3 of the declared total nitrogen content must be derived from isobutylidene diurea
Max. biuret content
(ureic N + isobutylidene diurea N) x 0,026
N Minimum content
18 % by weight
N Expressed as
As total nitrogen
Nutrient declaration
Total nitrogen

For each form amounting to at least 1 %: nitric nitrogen, ammoniacal nitrogen, ureic nitrogen

Nitrogen from isobutylidene diurea

A.1 Nitrogenous fertilisers
Production and Ingredients
Product obtained chemically containing isobutylidene diurea and a straight nitrogenous fertiliser [List A-1, excluding products 3(a), 3(b) and 5]
Type designation
Nitrogenous fertiliser containing isobutylidene diurea

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