Rumen disappearance of organic matter, crude protein, crude fibre, ADF and NDF from grasses, white clover and grass-white clover mixture W. Nowak, H. Kruczynska, M. Rogalski and A. KujawaAnn. Zootech., 44 Suppl. 1 (1995) 193DOI: https://doi.org/10.1051/animres:199505161