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Persistence of Birdsfoot Trefoil, Lotus corniculatus L. as Influenced by Plant Growth Habit and Grazing Management¹

The persistence of birds foot trefoil as a pasture legume grown with Kentucky bluegrass was studied for a 6-year period. The inclined point quadrat was used to measure changes in the trefoil stands as influenced by grazing system, species of grazing animal, and plant growth habit. Trefoil was shown to be a long-lived perennial. Rotational grazing was necessary for trefoil persistence under grazing; the trefoil stand was sharply reduced under continuous grazing. The species of grazing animal was not a major factor in trefoil persistence. Semiprostrategrowing ‘Empire’ was found to persist slightly better than upright-growing ‘Viking’.

Key Words: inclined point quadrat • Empire birdsfoot trefoil • Viking birdsfoot trefoil

² Professors of Agronomy

Received for publication July 26, 1967.