Varietal effect in perennial ryegrass on milk productivity of dairy cows in continuous grazing: turf variety vs forage variety L. Hazard, JC Emile, X. Charrier and M. GhesquièreAnn. Zootech., 44 Suppl. 1 (1995) 367DOI: https://doi.org/10.1051/animres:199505327