%0 Conference Proceedings %T Chemical Composition, Nitrogen Fractionation and In Vitro Gas Production of Bitter Vetch (Vicia ervila) and Soybean Meal %A Valizadeh, Reza %A Yari, Mojtaba %A Ehsan Ghiasi %A Mojtahedi, Mohsen %J The 14th AAAP Animal Science Congress %D 2010