<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The main purpose of this study was the model fitting of data deriving from a three-year experiment with barley malt. Two linear models were considered: a fixed linear model with fixed effects of years and other factors, and a mixed linear model with random effects of years and fixed effects of other factors. Two cultivars of brewing barley, Sebastian and Mauritia, six methods of nitrogen fertilization and four germination times were analyzed. Three quantitative traits were observed: practical extractivity of the malt, malting productivity, and a quality coefficient Q. The starting point for the statistical analyses was the available experimental material, which consisted of barley grain samples destined for malting. The analyses were performed over a series of years with respect to fixed or random effects of years. Due to the strong differentiation of the years of the study and some significant interactions of factors with years, annual analyses were also carried out.</p></abstract>

The main purpose of this study was the model fitting of data deriving from a three-year experiment with barley malt. Two linear models were considered: a fixed linear model with fixed effects of years and other factors, and a mixed linear model with random effects of years and fixed effects of other factors. Two cultivars of brewing barley, Sebastian and Mauritia, six methods of nitrogen fertilization and four germination times were analyzed. Three quantitative traits were observed: practical extractivity of the malt, malting productivity, and a quality coefficient Q. The starting point for the statistical analyses was the available experimental material, which consisted of barley grain samples destined for malting. The analyses were performed over a series of years with respect to fixed or random effects of years. Due to the strong differentiation of the years of the study and some significant interactions of factors with years, annual analyses were also carried out.

On modeling and analyzing barley malt data in different years

Department of Mathematical and Statistical Methods

Department of Fermentation and Cereals Technology

Wrocław University of Environmental and Life Sciences

Institute of Agroecology and Plant Production

Department of Genetics, Plant Breeding and Seed Production

Biometrical Letters

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

{"article-title":"On modeling and analyzing barley malt data in different years"}

The main purpose of this study was the model fitting of data deriving from a three-year experiment with barley malt. Two linear models were considered: a fixed...

On modeling and analyzing barley malt data in different years

Publié en ligne: 13 juin 2019

Pages: 45 - 57

DOI: https://doi.org/10.2478/bile-2019-0004

Mots clés
complete randomized design, fixed linear model, mixed linear model, Tukey’s HSD test, brewing barley, extractivity, malt, malting productivity, quality coefficient

© 2019 Iwona Mejza et al., published by Sciendo

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

On modeling and analyzing barley malt data in different years

Publié en ligne: 13 juin 2019

Pages: 45 - 57

DOI: https://doi.org/10.2478/bile-2019-0004

Mots cléscomplete randomized design, fixed linear model, mixed linear model, Tukey’s HSD test, brewing barley, extractivity, malt, malting productivity, quality coefficient

© 2019 Iwona Mejza et al., published by Sciendo

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

Mots clés
complete randomized design, fixed linear model, mixed linear model, Tukey’s HSD test, brewing barley, extractivity, malt, malting productivity, quality coefficient