Negash, A.W., Mwambi, H., Zewotir, T. and Aweke, G. 2014. Mixed model with spatial variance–covariance structure for accommodating of local stationary trend and its influence on multi-environmental crop variety trial assessment. Spanish Journal of Agricultural Research. 12, 1 (Feb. 2014), 195-205. DOI:https://doi.org/10.5424/sjar/2014121-4926.