Territorial analysis of the diffusion of organic farming in France: Between heterogeneity and spatial dependence

•Extent of conversion to organic farming (COF) and its local intensity are analyzed.•ICOF aid data (2007–2010) are aggregated for micro-territories.•A two stages hurdle model addresses extent and intensity different production systems.•COF clustering is significant despite diffusion into new territories and productions.•Spatiotemporal dependence exists, related to past collective institutional experience.