|Book Group Author:||NA|
The potential for improving irrigation scheduling decisions and adoption of more efficient irrigation systems is explored using a bioeconomic simulation model of lettuce production on the Gnangara Mound near Perth, Western Australia. Sandy soils with poor water and nutrient holding capacity are associated with declining marginal productivity of water at high water use, which would create an incentive to reduce water use and to adopt closer sprinkler spacing if farmers had correct information about the declining marginal productivity of water. Incorrect perceptions regarding water-yield relationships lead to over use of water by up to 50 per cent and reduce profits by $475 per crop hectare (12 per cent) in the short run, and remove the incentive to adopt more efficient systems in the long run. Higher water prices create an incentive to reduce irrigation scheduling time in the short term and to adopt more uniform sprinkler systems, and tend to reduce the discrepancies associated with poor information about the marginal productivity of water. The low level of adoption of efficient irrigation systems in the region might be explained partly by historically poor water governance and insufficient extension regarding water productivity and technology.
|Pages:||323 - 341|
|Journal:||Australian Journal of Agricultural and Resource Economics|
case studies, innovation adoption, irrigation scheduling,lettuces, plant water relations, productivity, profitability, simulationmodels, sprinkler irrigation, water conservation, water policy, wateruse, water use efficiency, Australia, Western Australia, Lactuca sativa,Australasia, Oceania, Developed Countries, Commonwealth of Nations, OECDCountries, Australia, Lactuca, Asteraceae, Asterales, dicotyledons,angiosperms, Spermatophyta, plants, eukaryotes, adoption of innovations,spray irrigation, Agricultural Economics (EE110), HorticulturalEconomics (EE111) (New March 2000), Natural Resource Economics (EE115)(New March 2000), Policy and Planning (EE120), Input Utilization(Microeconomics) (EE145), Horticultural Crops (FF003) (New March 2000),Plant Water Relations (FF062), Soil Water Management (Irrigation andDrainage) (JJ800) (Revised June 2002) [formerly Soil Water Management],Water Resources (PP200)