At a departmental level, one could find a "chambre d'agriculture". In case you intend to move in France and already know your department, the chambre d'agriculture may be of great advice locally. The network of chambres d'agriculture begins its history in the 1920s. Since the 1960s it works for the development of farming in France along with the French Government.
Farming in France: a european course for E.U residents
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To start with
A two weeks course near Limoges: to provide a background to French agriculture and its organisation and facilitate the installation and social-professional integration of E.U residents wishing to farm in France. This course is organised by the Agricultural training centre "C.F.P.P.A les Vaseix" and is sustained by the E.U and the Limousin Regional Council. Follow the link!