Using nylon bag techniques, Cornell net carbohydrates and protein systems (CNCPS), scanning electron microscopy, the authors examined digestibility structure of Vicia ervilia (ervil, bitter vetch) after steam flaking, roasting, microwave processing. During in situ technique, samples were incubated at 0, 2, 4, 6, 8, 12, 16, 24, 36, 48 h. For description ruminal DM (dry matter) CP (crude protein)...