Effect of ammonia treatment conditions of wheat straw on organic matter degradation measured in situ and by the gas test method Rabéha Chabaca, Saddek Triki, Aristide Larwence, Michel Paynot and Jean-Louis Tisserand Anim. Res., 51 3 (2002) 217-225 DOI: 10.1051/animres:2002015