The researchers used a method called GGE biplot to study how different types of silage maize plants grow in different environments. They looked at traits like yield, stem diameter, and plant height. The results showed that some plants did better in certain environments, and some traits were more important than others. For example, one plant had the highest yield and stem diameter, while another environment was the most unique. Overall, the GGE biplot method was effective in understanding how maize plants grow in different conditions.