/al fal"feuh/, n.
a plant, Medicago sativa, of the legume family, usually having bluish-purple flowers, originating in the Near East and widely cultivated as a forage crop. Also called lucerne, purple medic.
[1835-45; < Sp, var. of alfalfez < SpAr al the + fasfasah < Pers ispist lucerne]

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Perennial, clover-like legume (Medicago sativa).

It is widely grown primarily for hay, pasturage, and silage. It is known for its tolerance of drought, heat, and cold, and for its improvement of soil by nitrification (see nitrifying bacteria) due to bacteria associated with its roots. The plant, which grows 1–3 ft (30–90 cm) tall, develops numerous stems that arise from a much-branched crown at soil level, each bearing many three-leaved leaflets. Its long primary root
as long as 50 ft (15 m) in some plants
accounts for its unusual ability to tolerate drought. Its remarkable capacity for regeneration of dense growths of new stems and leaves following cutting makes possible as many as 13 crops of hay in one growing season. Alfalfa hay is very nutritious and palatable, high in protein, minerals, and vitamins.

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also called  lucerne , or  purple medic (Medicago sativa) 
 perennial, clover-like, leguminous plant of the pea family (Fabaceae), known for its tolerance of drought, heat, and cold; for the remarkable productivity and the quality of its herbage; and for its value in soil improvement. It is widely grown primarily for hay, pasturage, and silage. The plant, which grows 30–90 cm (1–3 feet) tall, arises from a much-branched crown that is partially embedded in the surface layer of soil. As the plant develops, numerous stems bearing many trifoliolate leaves arise from the crown buds. Racemes of small flowers arise from the upper axillary buds of the stems. With approaching maturity, corkscrew coiled pods containing from two to eight or more seeds develop abundantly in regions with much sunshine, moderate heat, dry weather, and pollinating insects.

      The primary root of alfalfa attains great depths. When 20 or more years of age, this taproot may descend as much as 15 m (50 feet) or more where the subsoil is porous. This accounts for the unusual ability of the plant to tolerate drought. The roots of seedling plants are known to penetrate the soil for 90 cm (3 feet) at two months and for 180 cm (6 feet) with plants five months of age. Not infrequently, newly established fields of alfalfa survive severe summer drought and heat when other leguminous plants with shallower and more branching roots succumb.

      Alfalfa has a remarkable capacity for rapid and abundant regeneration of dense growths of new stems and leaves following cutting. This makes possible from 1 to as many as 13 crops of hay in one growing season. The frequency of harvest and the total seasonal yields are dependent largely on the length of the growing season, the adaptability of the soil, the abundance of sunshine, and especially the amount and distribution of rainfall or irrigation during the growing season. Green leafy alfalfa hay is very nutritious and palatable, containing about 16 percent proteins and 8 percent mineral constituents. In addition it is rich in vitamins A, E, D, and K.

      Like all crops, alfalfa is beset with hazards of climate, diseases, and insects. Among the more serious of these are winterkill, bacterial wilt disease, alfalfa weevil, lugus bugs, grasshoppers, spotted aphid, and leafhoppers. In humid areas and in irrigated areas, alfalfa stands of three or more years of age have often become badly thinned by infestations of the soil-borne bacterial wilt organism Phytomonas insidiosum.

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Universalium. 2010.

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  • alfalfa — (n.) 1845, from Sp. alfalfa, earlier alfalfez, from Arabic al fisfisa fresh fodder …   Etymology dictionary

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  • Alfalfa — Al*fal fa, n. [Sp.] (Bot.) The lucern ({Medicago sativa}), a leguminous plant having bluish purple cloverlike flowers, and cultivated for fodder; so called in California, Texas, etc. [1913 Webster] …   The Collaborative International Dictionary of English

  • alfalfa — s.n. Seminţe încolţite de lucernă (Medicago sativa), utilizate ca ingredient în salate, umpluturi etc., ca aport de vitamine şi săruri minerale. Trimis de gal, 13.09.2007. Sursa: DGE …   Dicționar Român

  • alfalfa — s. f. Medicago sativa. Planta leguminosa con hojas en forma de trébol y flores violetas o azules, utilizada como forraje …   Diccionario Salamanca de la Lengua Española

  • alfalfa — ► NOUN ▪ a plant with clover like leaves and bluish flowers, grown in warm climates for fodder. ORIGIN Spanish, from an Arabic word meaning «a green fodder» …   English terms dictionary

  • alfalfa — [al fal′fə] n. [Sp < Ar al fiṣfiṣa, fodder in its freshest state] a deep rooted perennial plant (Medicago sativa) of the pea family, with small divided leaves, purple cloverlike flowers, and spiral pods, used extensively for fodder and pasture …   English World dictionary

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