Legumes are highly nutritious forage plants that are capable of fixing their own supply of nitrogen, with the assistance of rhizobia bacteria. Most legumes support higher animal productivity than grasses, but there are antiquality factors in some legume species that can be fatal to livestock. Legumes are a major contributor to livestock production in temperate regions, but less important in warmer climates because they are not as well suited to such climates as are C4 grasses. Persistence of perennial legumes requires intensive management and varies with each legume species.

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