Resin extraction consists of incising the outer layers of a pine tree in order to collect the sap or resin.
Resin circulates throughout a coniferous tree, and serves to seal damage to the tree. Harvesting pine resin dates back to Gallo-Roman times in Gascony.
Tapping pines may either be done so as to sustain the life of the tree, or exhaustively in the years before the tree is cut down.
In Gascony, and to a lesser extent in Provence, pine-tapping was practiced as a form of sharecropping, although uncertain status of the workers sometimes led to labor disputes.
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