The study was conducted in Dodoma and Morogoro regions in Tanzania. One district from each region was selected, Chamwino district in Dodoma and Kilosa district in Morogoro. Mzula and Chinoje villages in Chamwino and Tindiga and Mhenda villages in Kilosa district were selected based on factors such as geographical location, climate and consumption pattern of different indigenous vegetables (www.scale-n.org). Chamwino is located in the central plateau of Tanzania characterized by a dry Savannah and periodically semi-arid type of climate with long dry season starting late April to early December, and a short single wet season starting December to mid-April. The annual rainfall is between 350–500 mm. Kilosa District is located in eastern Tanzania characterized with sub-humid climatic condition with short rains starting in October to December and long rainfall period begin in February to May. This area has flat plains, highlands, and dry alluvial valleys with annual rainfall between 600–800 mm [13 (link)].
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