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more general categories information about this item 13. Food and Nutrition 13. Food and Nutrition Food and Nutrition (85) Commodity (19) description: The potato is a starchy, tuberous crop from the perennial nightshade Solanum tuberosum. Potato has become a staple food in many parts of the world and an integral part of much of the world's food supply. It is the world's fourth-largest food crop, following maize, wheat, and rice. The green leaves and green skins of tubers exposed to the light are toxic. AFDSI created a Potato ontology. complete name: Potato Ontology