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ISO 5311:2026

Fertilizers — Determination of bulk density (tapped)

Feb 20, 2026

General information

60.60     Feb 20, 2026

ISO

ISO/TC 134

International Standard

65.080  

English  

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Scope

This document specifies two methods for the determination of the bulk density (tapped) of solid fertilizers:

the machine-tapping method (method 1);
the hand-tapping method (method 2).

These methods are applicable to dry fertilizers only.
Neither method is suitable for materials which contain a large proportion of particles exceeding 5 mm in diameter.
Method 2 is applicable only to spherical granules and to prills. It is not applicable to sharp-edged grains.
NOTE            Because of the differences in tapping technique, the two methods will not necessarily give the same value for the bulk density (tapped).

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 5311:1992

NOW

PUBLISHED
ISO 5311:2026
60.60 Standard published
Feb 20, 2026