Transitions des exploitations agricoles vers l'agriculture biologique dans un territoire : approche par les interactions entre systèmes techniques et de commercialisation. Application aux aires d'alimentation de captages en Île-de-France

Abstract : Organic farming is one of the global solutions recommended in response to recent environmental regulations for preventive management of water quality. The aim of this thesis is to study the transition of farms towards organic farming in specific territories, based on the case of water catchment areas in Ile-de-France. From an agronomy of territories perspective, I develop a disciplinary interface with geography, and analyze these transitions from the viewpoint of interactions between technical and commercialization systems on various territorial scales. My research has included surveys on large-scale farmers and market gardeners in the Ile-de-France region, and on operators of agricultural supply chains. I have also examined "water catchment areas studies" under way. I first consider the potentialities and modalities of farms' transition to organic farming, by developing methods to evaluate their technical proximity to organic farming and the size of the technical and commercial leaps that they would have to make in a situation of conversion. In parallel, an analysis of the technical and commercial strategies of organic farms enables me to produce various biological models. I then show that the territorial opportunities of commercialization impact on organic farms' possibilities to evolve. Finally, the relevance of the water catchment area scale for engaging in territorialized development of organic farming is called into question. The complexity of the implementation of this objective is shown in relation to the superposition of territories of different natures. This work contributes to the understanding of obstacles to the effective introduction of organic farming in territories where drinking water is an issue.
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Caroline Petit. Transitions des exploitations agricoles vers l'agriculture biologique dans un territoire : approche par les interactions entre systèmes techniques et de commercialisation. Application aux aires d'alimentation de captages en Île-de-France. Sciences agricoles. AgroParisTech, 2013. Français. ⟨NNT : 2013AGPT0008⟩. ⟨pastel-00876309⟩

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