Statistic models for long-term experiment with corps system
Asreml-r (commercial package in R) was used for the mixed model and REML.
Asreml-r was recommended to cover variance-covariance structure that R(freeware) could not provide.
Find the original publication
A. Onofri, G. Seddai and H.-P. Piepho, European Journal of Agronomy Volume 77, 2016, Pages 223–235.