Theoretical framework for crop variety trials -- An overview of variety trial data and analyses -- Introduction to biplot analysis -- Data centering for biplot analysis -- Data scaling and weighting for GGE biplot analysis -- Frequently asked questions about biplot analysis -- Single trial data analysis -- Genotype by location two-way data analysis -- Genotype by trait data analysis and decision making -- Trait association by environment two-way table analysis -- Location by trait two-way data analysis -- Mega-environment analysis based on multi-year data -- Test location evaluation based on multi-year data -- Genotype evaluation based on multi-year data -- Building and utilizing a relational database for crop variety trial data -- Experimental design for variety trials and breeding nurseries -- Modules and functions in GGEbiplot