improved ability to overwinter in cold climates.and multileaf traits.Disease resistance is important because it improves the usefuess of poorly drained soils and during e vears. Multileaf alfalfa has more than three leaflets per leaf.These lines may have a higher nutitional content by weight because there is relatively more leafy matter for the same amount of stem.improved ability to overwinter in  cold climates,  and  multileaf traits.  Disease resistance is important because it improves the usefulness of alfalfa on poorly  drained soils,  and during wet  years.  Multileaf alfalfa has more than three leaflets  per leaf. These lines may have a higher nutitional  content by weight because there is relatively more leafy matter for the same amount of stem