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Article Dans Une Revue European Review of Agricultural Economics Année : 2014

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

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Résumé

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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Dates et versions

hal-01169923 , version 1 (30-06-2015)

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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, 2014, 41 (5), pp.707-743. ⟨10.1093/erae/jbt039⟩. ⟨hal-01169923⟩

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