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• Agfacts: Onion Growing - Illustrated factsheet from the NSW Department of Primary Industries covering variety selection, sowing, site selection, irrigation, nutrition, harvesting, curing, weed control and pest and disease management. [PDF]
• Definition and Classification of Commodities: Roots and Tubers and Derived Products - A Food and Agriculture Organization (FAO) site that describes root and tuber crops and derived products.
• Elephant Foot Yam - Describes the uses of, and promotes the cultivation of the tuber of Amorphophallus paeoniifolius.
• International Potato Center (CIP) - Information about the center and its roles in promoting potatoes, sweet potatoes and other Andean root crops, and in protecting Andean biodiversity.
• Manrique International Agrotech (MIAT) - Consulting company specialized in tropical agriculture. Publishes books on potato, cassava, sweet potato, taro and other tropical crops. Web site has glossary of agronomic terms and fact sheets on potato, cassava, sweet potato, and taro.
• Onion Production Guide - Comprehensive production guide covering all aspects from insect control to food safety practices, provided by the University of Georgia extension.
• Post-Harvest Operation: Edible Aroids - Provides information on harvesting, transport, corm curing, cleaning, packaging, storage, processing and aroids for rural agro-industrialisation.
• Post-Harvest Operation: Onion - Provides information on harvesting, transport, curing, drying, cleaning, packaging and bulk storage and processing.
• Potato, Onion and Vegetable Storage - Agricultural refrigeration and ventilation equipment for potato and onion storage. Personally designed using skid units, Cropscan temperature controls, motorised louvres, mixer boxes, and fans.
• What is the Difference Between a Sweetpotato and a Yam? - This site seeks to answer the question about "yams" and sweetpotatoes.