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Kamis, 27 November 2014

Bean

Bean is a common name for large plant seeds used for human food or animal feed of several genera of the family Fabaceae (alternately Leguminosae). 

The term bean originally referred to the seed of the broad or fava bean,[citation needed] but was later expanded to include members of the New World genus Phaseolus, such as the common bean and the runner bean, and the related genus Vigna. The term is now applied generally to many other related plants such as Old World soybeans, peas, chickpeas (garbanzos), vetches, and lupins.[citation needed]

Bean is sometimes used as a synonym of pulse,[citation needed] an edible legume, though the term pulses is normally reserved for leguminous crops harvested for their dry grain. The term bean usually excludes crops used mainly for oil extraction (such as soybeans and peanuts), as well as those used exclusively for sowing purposes (such as clover and alfalfa). Leguminous crops harvested green for food, such as snap peas, snow peas, and so on, are not considered beans, and are classified as vegetable crops. According to United Nation's Food and Agriculture Organization the term bean should include only species of Phaseolus; however, a strict consensus definition has proven difficult because in the past, several species such as Vigna angularis (azuki bean), mungo (black gram), radiata (green gram), aconitifolia (moth bean)) were classified as Phaseolus and later reclassified.