In situ N-degradability of fresh forages corrected for microbial contamination determined by 15N-labelling of feedstuffs or liquid-and solid-associated bacteria M. Kamoun, Y. Beckers, A. Théwis, E. François and P. LecomteAnn. Zootech., 43 Suppl. 1 (1994) 12s-13sDOI: https://doi.org/10.1051/animres:19940504