Intensive and extensive margin adjustments to water scarcity in France's Cereal Belt

Abstract : Efficient water management in agriculture is becoming critical due to increasing environmental constraints and global food and bio-energy demands. Farmers may respond to increased water scarcity along three main adjustment margins: amove towards rain-fed agriculture (super-extensive margin) or towards less water-intensive crops (extensive margin), and a reduction in water intensity for irrigated crops (intensive margin). Using a positive mathematical programming model of regional supply calibrated to economic and agronomic information, we decompose the total effect of reduced water availability on these adjustment margins in Beauce, a productive cereal region that relies on a groundwater resource to meet its irrigation needs. For realistic water scarcity scenarios, 57 per cent of the total response is attributable to super-extensive margin adjustments. The extensive margin represents 28 per cent of the total response, while the intensive margin accounts for 15 per cent. Crop-level analysis reveals more subtle adaptation patterns.
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Article dans une revue
European Review of Agricultural Economics, Oxford University Press (OUP), 2014, 41 (5), pp.707-743. 〈10.1093/erae/jbt039〉
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Contributeur : Anne-Marie Pouget <>
Soumis le : mardi 30 juin 2015 - 14:52:13
Dernière modification le : jeudi 2 juillet 2015 - 10:22:54

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Nina Graveline, Pierre Merel. Intensive and extensive margin adjustments to water scarcity in France's Cereal Belt. European Review of Agricultural Economics, Oxford University Press (OUP), 2014, 41 (5), pp.707-743. 〈10.1093/erae/jbt039〉. 〈hal-01169923〉

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