Compression testing of granular NPK fertilizers

G. M. Walker; T. R.A. Magee; C. R. Holland; M. N. Ahmad; N. Fox; N. A. Moffatt

doi:10.1023/A:1009714306464

Compression testing of granular NPK fertilizers

G. M. Walker, T. R.A. Magee, C. R. Holland, M. N. Ahmad, N. Fox, N. A. Moffatt

Research output: Contribution to journal › Article › peer-review

Abstract

The crush strength of granular NPK fertilizer has been accurately determined using Instron compression testing equipment. Stress-strain analysis shows a distinctive break point followed by break up of granule fragments. The force required to crush the granules is a function of the granule diameter but the calculated pressure required to crush each granule remained relatively constant. Factors such as moisture ingress and coating oils have been shown to affect granule strength. A direct link between caking of granular fertilizers and crush strength has been established.

Original language	English
Pages (from-to)	231-234
Number of pages	4
Journal	Nutrient Cycling in Agroecosystems
Volume	48
Issue number	3
DOIs	https://doi.org/10.1023/A:1009714306464
Publication status	Published - 1997
Externally published	Yes

Keywords

Break strength
Compression testing
Conditioners
Fertilizer caking
NPK fertilizers

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keywords = "Break strength, Compression testing, Conditioners, Fertilizer caking, NPK fertilizers",

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AU - Walker, G. M.

AU - Magee, T. R.A.

AU - Holland, C. R.

AU - Ahmad, M. N.

AU - Fox, N.

AU - Moffatt, N. A.

PY - 1997

Y1 - 1997

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AB - The crush strength of granular NPK fertilizer has been accurately determined using Instron compression testing equipment. Stress-strain analysis shows a distinctive break point followed by break up of granule fragments. The force required to crush the granules is a function of the granule diameter but the calculated pressure required to crush each granule remained relatively constant. Factors such as moisture ingress and coating oils have been shown to affect granule strength. A direct link between caking of granular fertilizers and crush strength has been established.

KW - Break strength

KW - Compression testing

KW - Conditioners

KW - Fertilizer caking

KW - NPK fertilizers

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JO - Nutrient Cycling in Agroecosystems

JF - Nutrient Cycling in Agroecosystems

IS - 3

ER -

Compression testing of granular NPK fertilizers

Abstract

Keywords

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