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Savremena poljoprivredna tehnika
2010, vol. 36, iss. 3, pp. 239-246
Relation of the dynamic strength of fertilizers and their particle size distribution from the point of field application
Macák Miroslav, Nozdrovický Ladislav
Faculty of Engineering, Slovak University of Agriculture, Nitra, Slovak Republic

email: miroslav.macak@uniag.sk, ladislav.nozdrovicky@uniag.sk
Keywords: granular fertilizer; dynamic strength; air pressure; fertilizer particle size distribution
Abstract
The quality of field application of solid fertilizers depends upon their physical and mechanical properties. Dynamic strength of fertilizers and their particle size distribution are considered as important properties affecting the quality of field application. With this motivation in mind, the authors conducted a study of the relationship between the dynamic strength of fertilizer particles, their size distribution, and acting air pressure during laboratory tests. These tests have been conducted according to the national standard STN 65 4827 - Method for determination of fertilizer dynamic strength. For the two selected granular fertilizer types a series of laboratory measurements of the mechanical damages of the fertilizer particles were conducted under conditions of variable air pressure. Before the experiments each fertilizer sample was sieved to obtain specific fractions. After the experiments, the results were subjected to analysis of variance, ANOVA. According to obtained results it is possible to determine the estimated level of fertilizer particle damage due to impact of dynamic forces in the application mechanism of the fertilizer spreader.
References

*** STN 65 4823 - Metóda stanovenia granulometrického zloženia. Slovak National Standard

*** STN 65 4827 - Metóda stanovenia dynamickej pevnosti priemyselných hnojív. Slovak National Standard

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article language: English
document type: Original Scientific Paper
published in SCIndeks: 21/12/2010

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