International Organization for Standardization (ISO)
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ISO 3944:1992
Scope
The method is applicable to solid, but not powder fertilizers, dry only. It is not suitable for fertilizers which contain a large proportion of particles exceeding 5 mm in diameter. Its principle is pouring the fertilizer from a specified funnel into a specified measuring cylinder of known volume and weighing the contents of the cylinder. If the fertilizer has absorbed moisture during transport or storage, it is necessary to dry it in an environmental chamber.
ISO 3944:1992 history
1992ISO 3944:1992 Fertilizers; determination of bulk density (loose)
1980ISO 3944:1980 Fertilizers — Determination of bulk density (loose)
1977ISO 3944:1977 Title missing - Legacy paper document