Vigna subterranea

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Vigna subterranea (common names: Bambara groundnut, Bambara nut, Bambara bean, manicongo, Congo goober, earth pea, ground-bean, or hog-peanut) is a member of the family Fabaceae. Its name is derived from the Bambara ethnic group. It reproduces via geocarpy, ripening its pods underground, much like the peanut (also called a groundnut). The plant originated in West Africa. As a food and source of income, the Bambara groundnut is considered to be the third most important leguminous crop in those African countries where it is grown, after peanut and cowpea. The crop is mainly cultivated, sold and processed by women, and is, thus, particularly valuable for female subsistence farmers. Bambara groundnut represents the third most important grain legume in semi-arid Africa. It is resistant to high temperatures and is suitable for marginal soils where other leguminous crops cannot be grown. It is a low-impact crop. The entire plant is known for soil improvement because of nitrogen fixation. The pods can be eaten fresh or boiled after drying, and can be ground either fresh or dry to make puddings.