ISO/FDIS 3944

Third edition
1992-07
ISO/TC 134
Secretariat: INSO
Date: 1992-07-092019-05-252025-11-24
Fertilizers — Determination of bulk density (loose)
Engrais — Détermination de la masse volumique sans tassement
FDIS stage
© ISO 19922025
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© ISO 19922025 – All rights reserved
ii
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Preparation of test sample . 2
7 Procedure . 2
8 Expression of results . 2
8.1 Method of calculation . 2
8.2 Repeatability . 3
9 Test report . 3

© ISO 19922025 – All rights reserved
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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This document was prepared by Technical Committee ISO/TC 134, Fertilizers and, soil conditioners, WG 1
Fertilizers and beneficial substances.
This fourth edition cancels and replaces the third edition (ISO 3944:1992),) of which has been technically
revised.
it constitutes a minor revision. The main changes are as follows:
— Updating of the Foreword
— — Substitution ofnormative reference to ISO 8358 in Clause 6by was changed to ISO 14820-2 in 2
References and 7 Preparation of test sample.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 19922025 – All rights reserved
iv
Introduction
The bulk densities (loose and tapped) of a fertilizer provide information relative to the required size of
packaging materials, store-houses, stock-rooms, etc. Generally, the bulk density (tap
...