I've been doing AMMI analysis (Additive Main effects and Multiplicative Interaction) using the R package (agricolae) to get the AMMI stability value (ASV) and Yield stability index (YSI). I've managed to get the ASV and YSI for the genotypes but not the environments. Are there specific commands for getting ASV and YSI for environments?

Here are the commands i used

> library(agricolae)

> gf attach(gf);str(gf)

>modell modell$ANOVA

> index index