Which country is the world's largest producer of yams?

Approximately what percentage of global yam production comes from West Africa?

What factor most significantly limits international trade in fresh yams?

Which value-added yam product has seen the greatest growth in international trade?

What organization collects and publishes global yam production statistics?

What economic trend has affected yam production in traditional growing regions?

Which market segment has shown increased demand for specialty yam varieties?

What factor most significantly affects year-to-year market prices for yams?

What percentage of harvested yams is estimated to be lost to spoilage in developing countries?

What economic role do yams play in traditional West African societies?