8Abidin Z, Kempton T. Effects of treatment of barely straw with anhydrous ammonia and supplements with heat treated protein meals on feed intake and live weight performance of growing lambs. Animal Feed Science and Technology, 1981,7 : 1- 10.
9Butter M R, Lechtenberg V L, Hendrix K S, et al. Composition and digestion of ammoniated tall rescue (Festuca arundinacea Sehreb) hay. J Animal Sei, 1982,54(1) : 173-178.
10Colombatto D, Mould F L, Bhat M K, et al, In vitro evaluation of fibrolytic enzymes as additives for maize(Zea rays L. silage. II. Elects on rate of acidification, fibre degradation duing ensiling and tureen fermentation. Animal Feed Science and Technology, 2004,111 : 129-143.