Modeling farm-level adoption of deficit irrigation using Positive Mathematical Programming
Irrigated agriculture in the European Union (EU) is currently adapting to new conditions including the principle of the full recovery of water service costs, the reduction of water availability and the increasing variability in the prices of agricultural products. This has fostered an increasing number of economic analyses to investigate farmers' behaviour by means of mathematical programming techniques including Positive Mathematical Programming (PMP) models. However PMP models generally consider only activities observed in the reference period even if, under new policies and market conditions, farmers can adopt irrigation techniques they have not used previously. In particular, under increasing water costs or decreasing water availability, farmers can introduce Deficit Irrigation (DI) techniques that might not have been profitable earlier. We propose an extension of the PMP approach to include DI techniques not observed in the reference period. These alternative techniques are identified by means of a crop growth model developed by the FAO. We apply our methodology to a Mediterranean area using three sets of simulations involving: increases in water costs, reductions in water availability, and changes in the prices of the products obtained from irrigated crops. Lacking observations of alternative irrigation techniques, our approach captures potential technology adjustments and assesses the impact of changes in water policy and market conditions in a better way. Simulation results show that increasing water costs do not motivate adoption of DI techniques. Rather, farmers are induced to save water by switching from full irrigation to deficit irrigation when water availability is reduced or the prices of irrigated crops are increased.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Joan Pujol & Meri Raggi & Davide Viaggi, 2006.
"The potential impact of markets for irrigation water in Italy and Spain: a comparison of two study areas ,"
Australian Journal of Agricultural and Resource Economics,
Australian Agricultural and Resource Economics Society, vol. 50(3), pages 361-380, 09.
- Pujol, Joan & Raggi, Meri & Viaggi, Davide, 2006. "The potential impact of markets for irrigation water in Italy and Spain: a comparison of two study areas," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 50(3), September.
- Reca, Juan & Roldan, Jose & Alcaide, Miguel & Lopez, Rafael & Camacho, Emilio, 2001. "Optimisation model for water allocation in deficit irrigation systems: I. Description of the model," Agricultural Water Management, Elsevier, vol. 48(2), pages 103-116, June.
- Berbel, J. & Gomez-Limon, J. A., 2000. "The impact of water-pricing policy in Spain: an analysis of three irrigated areas," Agricultural Water Management, Elsevier, vol. 43(2), pages 219-238, March.
- Iglesias, Eva & Garrido, Alberto & Gomez-Ramos, Almudena, 2003. "Evaluation of drought management in irrigated areas," Agricultural Economics, Blackwell, vol. 29(2), pages 211-229, October.
- Farré, I. & Faci, J.-M., 2009. "Deficit irrigation in maize for reducing agricultural water use in a Mediterranean environment," Agricultural Water Management, Elsevier, vol. 96(3), pages 383-394, March.
- Blanco, Maria & Cortignani, Raffaele & Severini, Simone, 2008. "Evaluating Changes in Cropping Patterns due to the 2003 CAP Reform. An Ex-post Analysis of Different PMP Approaches Considering New Activities," 107th Seminar, January 30-February 1, 2008, Sevilla, Spain 6674, European Association of Agricultural Economists.
- Severini, Simone & Cortignani, Raffaele, 2008. "Introducing deficit irrigation crop techniques derived by crop growth models into a Positive Mathematical Programming model," 2008 International Congress, August 26-29, 2008, Ghent, Belgium 44010, European Association of Agricultural Economists.
- Iglesias, Eva & Garrido, Alberto & Gomez-Ramos, Almudena, 2003. "Evaluation of drought management in irrigated areas," Agricultural Economics of Agricultural Economists, International Association of Agricultural Economists, vol. 29(2), October.
- English, Marshall & Raja, Syed Navaid, 1996. "Perspectives on deficit irrigation," Agricultural Water Management, Elsevier, vol. 32(1), pages 1-14, November.
- Ottmar R�hm & Stephan Dabbert, 2003. "Integrating Agri-Environmental Programs into Regional Production Models: An Extension of Positive Mathematical Programming," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 85(1), pages 254-265.
- Bartolini, Fabio & Bazzani, Guido Maria & Gallerani, Vittorio & Raggi, Meri & Viaggi, Davide, 2005. "Water Policy and Sustainability of Irrigated Farming Systems in Italy," 2005 International Congress, August 23-27, 2005, Copenhagen, Denmark 24518, European Association of Agricultural Economists.
When requesting a correction, please mention this item's handle: RePEc:eee:agiwat:v:96:y:2009:i:12:p:1785-1791. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Zhang, Lei)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.