Available information on ruminal degradability of legume seeds as plant protein supplements is scarce, and data reported have usually been obtained in animals fed high forage diets, with a forage to concentrate ratio higher than commonly used in intensive beef production systems. This difference is important, because in high concentrate diets protein degradation is usually reduced (Ganev et al., 1979; Lindberg, 1981b; Molero et al., 2004)