90.20 Standard under periodical review Jul 15, 2026
ISO
ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
International Standard
65.080 Fertilizers
ISO 15604:2016 specifies a method for the determination of any one form of nitrogen in the presence of any other form.
The method is applicable to any fertilizer provided for in the Regulation (EC) No 2003/2003, Annex I[2] containing nitrogen in various forms.
PUBLISHED
ISO 15604:2016
90.20
Standard under periodical review
Jul 15, 2026