This document specifies general requirements, analytical methods, sampling and preparation of test sample, marking and labelling, packaging, transport and storage for solid urea aldehyde slow release fertilizer. This document applies to pure solid urea aldehyde slow release fertilizer, i.e. urea formaldehyde (UF), methylene urea (MU), crotonylidene diurea (CDU), isobutylidene diurea (IBDU). This document does not apply to mixtures of nitrogenous fertilizers containing solid urea aldehyde slow release fertilizer.st edition 2017-03 Fertilizers and soil conditioners — Solid urea aldehyde slow release fertilizer — General requirements Engrais et amendements — Engrais urée aldéhyde solide à libération lente — Exigences générales Reference number ISO 19670:2017(E) ？ ISO 2017 ISO 19670:2017(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 2017, Published in Switzerland All r