Grass/legume pastures are grown in many countries as livestock feed because of low forage yields and problems of bloat on pure legume pastures and crude protein deficiencies in pure grass pastures. Some of these grass/legume pastures have also proved much more productive in dry matter yields than the pure pastures of either the grasses or the legumes. Several workers, notably Wagner (1954), Aberg, Johnson & Wilsie (1943), McCloud & Mott (1953), Johnstone- Wallace (1937), Chamblee (1958), and Hamilton, Scholl & Pope (1969), have found that the grass