Salehpour,M , , Amanlou,H , , Mirzaei-Alamouti,H R , and Eslamian Farsouni,N . "Effects of nutritional grouping on productive performance and culling rate and its causes in dairy herd", Iranian Journal of animal Science, 50, 4, 2020, 341-350. doi: 10.22059/ijas.2020.287871.653732