Protein supplements were solvent-extracted soybean meal, solvent-extracted sunflower meal, peas
(Pisum sativum L.), lupin seeds (Lupinus sp.), broadbean (Vicia faba L.), horsebean (Vicia
faba L. var. equina) and vetch (Vicia sativa L.). Alfalfa hay was also incubated at the same
time to estimate ruminal degradation of DM and NDF