This article returns to an old but not hitherto satisfactorily solved question, and aims at putting forward a new approach to the study of the sources and authorship of two contemporary treatises on agriculture: the Nabatean Agriculture and the Geoponica. Each of them embodies a long tradition reaching from Antiquity to the 10th century in two different cultural provinces expressed in Greek / Latin and Arabic languages. But there is another common feature of these works. Both of them survived in (...) a significant number of manuscripts, and constitute a kind of revision of previous compilations which drew their contents from more ancient treatises brought to light between the 3rd and 6th centuries AD, and to some extent could be qualified as the outcome of an effort for systematising the corpus of agronomical science. Texts and translations from Greek to Latin, from Greek to Syriac or to Arabic, and from Arabic to Armenian attest to this cultural intercommunication. (shrink)