Slow-release fertilizers — Determination of the release of the nutrients — Method for coated fertilizers

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

12-15-2017

Publisher

International Organization for Standardization

ISO 21263:2017 specifies a method for the determination of the slow release properties of nutrients from coated fertilizers. pH-dependent hydrolysis and degradation by biological or microbial mechanisms are excluded.

The specified method is only applicable to products releasing any nutrients by means of a non-biological process (i.e. those where the nutrients are released by a physical mechanism). Microbial attack on the coating (e.g. sulfur coated fertilizers) and the consequences thereof are not measurable by the technique described.

This method involves a lengthy process which may not be appropriate for day to day testing purposes. Accelerated methods can be used provided they are correlated with this document. An example of such an accelerated method is described in Annex B. Regression analysis can also be used for this purpose.

DevelopmentNote	Supersedes ISO/DIS 21263. (12/2017)
DocumentType	Standard
Pages	9
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
BS ISO 21263:2017	Identical

EN 1482:1996/AC:1996	SAMPLING OF SOLID FERTILIZERS AND LIMING MATERIALS
ISO 5725:1986	Precision of test methods Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests
ISO 3696:1987	Water for analytical laboratory use — Specification and test methods