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http://avrdc.org/saving-seed/

The World Vegetable Center, as the name implies, focuses on vegetables to reduce poverty and malnutrition. Their website has numerous, helpful resources and publications. Among them are videos on how to save vegetable seed. They cover amaranth, eggplant, nightshade (see EDN 103), pumpkin and tomato. Available in French, Tok Pisin, Indonesian and English languages, the videos present practical seed-saving and storage practices relevant to small-scale farmers and gardeners.