BS ISO 21263:2017
Current
The latest, up-to-date edition.
Slow-release fertilizers. Determination of the release of the nutrients. Method for coated fertilizers
Hardcopy , PDF
English
11-01-2018
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling
7 Procedure
8 Expression of results
9 Precision
10 Test report
Annex A (normative) - Criteria for release conditions
Annex B (informative) - Accelerated test methods
based on an elevated temperature
Bibliography
Defines a method for the determination of the slow release properties of nutrients from coated fertilizers.
| Committee |
CII/37
|
| DevelopmentNote |
Supersedes 16/30334936 DC. (01/2018)
|
| DocumentType |
Standard
|
| Pages |
16
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This document 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 AnnexB. Regression analysis can also be used for this purpose.
| Standards | Relationship |
| 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 |
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