Tropical root crops: foods for a hungry world [cassava, sweet potatoes, yam, potatoes, taro].

colocasia consommation alimentaire consumo de alimentos crop yield dioscorea food consumption food production food resources ipomoea batatas manihot esculenta nutritive value papa pomme de terre potatoes production alimentaire recursos alimentarios rendement des cultures rendimiento de cultivos ressource alimentaire root vegetables valeur nutritive valor nutritivo