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''Vicia villosa'', known as the hairy vetch, fodder vetch or winter vetch, is a plant native to Europe and western Asia. It is a legume, grown as a forage crop. Hairy vetch is very similar to tufted vetch (''Vicia cracca''), the most noticeable difference being that tufted vetch has a smooth stem. Several subspecies are recognized: * ''Vicia villosa'' ssp. ''ambigua'' (Guss.) Kerguelen (= ssp. ''elegantissima'', ssp. ''pseudocracca'') * ''Vicia villosa'' ssp. ''eriocarpa'' (Hausskn.) P.W.Ball * ''Vicia villosa'' ssp. ''microphylla'' (d'Urv.) P.W.Ball * ''Vicia villosa'' ssp. ''varia'' (Host) Corb. (= ssp. ''dasycarpa'') * ''Vicia villosa'' ssp. ''villosa'' ==Cultivation== Hairy vetch is widely used by organic growers in the United States as a winter cover crop and in no-till farming, as it is both winter hardy and can fix as much as 200 lb/acre of atmospheric nitrogen. Disadvantages of hairy vetch in production agriculture are related to the crop having a portion of hard seed and its tendency to shatter seed early in the season - leading to it remaining in the field as a weed later in the season. This can be a particular problem in wheat production. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Vicia villosa」の詳細全文を読む スポンサード リンク
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