Some tips and links to learn more about "arboreal archeology".
Arboreal Archeology. A Diary of Two Fruit Explorers
A book written by Isabella Dalla Ragione and Livio Dalla Ragione, Ali&No Editrice
To purchase the volume
FAO International Treaty on Plant Genetic Resources for Food and Agriculture
Bioversity International (IPGRI)
IPGRI is an international research institute with a mandate to advance the conservation and use of genetic diversity