<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The article presents results of research on the bulk and shaken density of two commercial fertilizers: Pulgran urea and universal nitrogen fertilizer Salmag. A statistical analysis of the obtained results of average density at the assumed level of significance proved a significant difference between shaken and bulk density investigated with the use of Engelsmann apparatus and shaken density tested with a laboratory shaker for both investigated fertilizers. The obtained test results and uncertainty of the measured values served for calculation of uncertainty of the standard complex bulk and shaken density determined in case of many uncertainties. Further, an analysis of the impact of error sources on the value of complex uncertainty was conducted. The final results of the measurement were presented according to the convention of the Central Office of Measures.</p></abstract>

The article presents results of research on the bulk and shaken density of two commercial fertilizers: Pulgran urea and universal nitrogen fertilizer Salmag. A statistical analysis of the obtained results of average density at the assumed level of significance proved a significant difference between shaken and bulk density investigated with the use of Engelsmann apparatus and shaken density tested with a laboratory shaker for both investigated fertilizers. The obtained test results and uncertainty of the measured values served for calculation of uncertainty of the standard complex bulk and shaken density determined in case of many uncertainties. Further, an analysis of the impact of error sources on the value of complex uncertainty was conducted. The final results of the measurement were presented according to the convention of the Central Office of Measures.

Uncertainty of Measurement of Bulk and Shaken Density of Pulgran and Salmag

Department of Machinery Exploitation and Management of Production Processes

Department of Applied Mathematics and Computer Science

Agricultural Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Uncertainty of Measurement of Bulk and Shaken Density of Pulgran and Salmag"}

The article presents results of research on the bulk and shaken density of two commercial fertilizers: Pulgran urea and universal nitrogen fertilizer Salmag. A...

Uncertainty of Measurement of Bulk and Shaken Density of Pulgran and Salmag

Published Online: Sep 30, 2020

Page range: 73 - 81

Received: Jun 01, 2020

Accepted: Aug 01, 2020

DOI: https://doi.org/10.1515/agriceng-2020-0028

Keywords
complex standard uncertainty, bulk density, shaken density

© 2020 Janusz Nowak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Uncertainty of Measurement of Bulk and Shaken Density of Pulgran and Salmag

Published Online: Sep 30, 2020

Page range: 73 - 81

Received: Jun 01, 2020

Accepted: Aug 01, 2020

DOI: https://doi.org/10.1515/agriceng-2020-0028

Keywordscomplex standard uncertainty, bulk density, shaken density

© 2020 Janusz Nowak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
complex standard uncertainty, bulk density, shaken density