The FAO may want to help the universities in tropical areas establish major nurseries and garden centers near major towns such as the highly successful and profitable Garden Center in Torremolinas Spain. https://www.yelp.com/biz_photos/garden-center-infantes-c%C3%A1rtama
Technical tree nursery expertise can be provided by the CIFOR-ICRAF office in Cameroon https://www.cifor-icraf.org/locations/africa/cameroon/
Here are the 20 most common trees in Cameroon, https://www.picturethisai.com/region/tree/Cameroon.html
博士 Paul Rigterink