After describing trees that are thriving and yet fail to bear fruit, he recommends the following procedure: “It is a good plan to bore them with a Gallic auger and to put tightly into the hole a green slip taken from a wild olive - tree; the result is that the tree, being as it were impregnated with fruitful offspring, becomes more productive. ”
Kirjeldanud puid, mis küll jõudsalt kasvavad, kuid ei kanna vilja, soovitab ta järgmist toimimisviisi: „Oleks hea puurida neisse Gallia puuriga auk ja suruda sinna haljas oksake metsikult oliivipuult; nõnda saab puu nii - öelda eostatud viljaka võrsega ja hakkab rohkem saaki andma. ”