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Fertilizer

Fertilizer particle testing standards are published by ISO and BS. ISO standards cover determination of bulk density, method of checking the performance of mechanical devices for sampling of product moving in bulk, reduction of samples, determination of bulk density of fine-grained fertilizers, test sieving, and the measurement of static angle of repose. BS standards cover the method of checking the performance of mechanical devices for sampling of solid fertilizer moving in bulk, measurement of static angle of repose, test sieving, and determination of bulk density.

ISO 3944:1992

Fertilizers - Determination of bulk density (loose)

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.

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ISO 5308:1992

Solid fertilizers -- Method of checking the performance of mechanical devices for sampling of product moving in bulk

This International Standard specifies a method of checking the performance of mechanical devices for sampling fertilizers moving in bulk by comparison of particle size distribution with that obtained by a reference method. It is applicable to any form of mechanical sampling device installed at some point in a bulk-handling system, providing that either the fertilizer passes along a conveyor belt, before or after the device, or it is subsequently packed in bags in order that a reference collection can be made.

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ISO 7742:1988

Solid fertilizers - Reduction of samples

The method consists in passaging of the material through a rotating sample divider and collecting of the fractions, followed by rejection or recombination of some of the fractions. By choosing suitable equipment it is applicable to any mass above a minimum defined by size and number of particles.

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ISO 7837:1992

Fertilizers - Determination of bulk density (loose) of fine-grained fertilizers

The method is applicable to fertilizers, dry only, which contain a large proportion of particles of diameters less than 0,5 mm. Its principle is pouring the fertilizer from a specified filling device 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.

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ISO 8397:1988

Solid fertilizers and soil conditioners - Test sieving

Specifies a method for the determination of a particle size distribution, consisting in mechanical dry sieving of a sample with one or more test sieves.The second edition cancels and replaces the first edition (1986), clause 10 of which has been amended.

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ISO 8398:1989

Solid fertilizers - Measurement of static angle of repose

The method is suitable for free flowing materials for measuring angles greater than 20 , but not for those which contain a large proportion of particles exceeding 5 mm in diameter.It consists in measuring of the height and diameter of the base of the cone, obtained by allowing a sample to fall through a fixed distance from a defined funnel onto a horizontal baseplate.

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BS 5551-2.10:1993

Fertilizers. Sampling. Method of checking the performance of mechanical devices for sampling of solid fertilizer moving in bulk (British Standard)

This International Standard specifies a method of checking the performance of mechanical devices for sampling fertilizers moving in bulk by comparison of particle size distribution with that obtained by a reference method. It is applicable to any form of mechanical sampling device installed at some point in a bulk-handling system, providing that either the fertilizer passes along a conveyor belt, before or after the device, or it is subsequently packed in bags in order that a reference collection can be made.

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BS EN 12047:1997

Solid fertilizers. Measurement of static angle of repose (British Standard)

This international standard specifies a method for the measurement of the static angle of repose of solid fertilizers. The method is applicable to free flowing fertilizers and is suitable for measuring static angles of repose greater than 20 °C; the method is not suitable for materials which contain a large proportion of particles exceeding 5 mm in diameter.

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BS EN 1235:1995

Solid fertilizers. Test sieving (British Standard)

Specifies a method for the determination of a particle size distribution, consisting in mechanical dry sieving of a sample with one or more test sieves.The second edition cancels and replaces the first edition (1986), clause 10 of which has been amended.

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BS EN 1236:1995

Fertilizers. Determination of bulk density (loose) (British Standard)

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.

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