How are yams primarily classified botanically?

What is the basis for the traditional West African classification system for yams?

Which of the following is NOT a common basis for farmers' classification of yam varieties?

What modern approach has been used to verify traditional yam classification systems?

Which organization has established international standards for yam germplasm classification?

How are cultivated yam varieties typically classified in agricultural systems?

What classification challenge is common with traditional yam landraces?

Which classification approach combines traditional farmer knowledge with scientific analysis?

What system is used to maintain records of yam genetic resources in germplasm banks?