The economics of sprinkler irrigation uniformity for lettuce production with in-season rainfall

Hussain, A. and Raine, S. R. and Smith, R. J. (2009) The economics of sprinkler irrigation uniformity for lettuce production with in-season rainfall. In: SEAg 2009: Agricultural Technologies in a Changing Climate , 13-16 Sep 2009, Brisbane, Queensland.

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Abstract

Irrigation non-uniformity has been shown to adversely affect crop production and it is often assumed that high levels of uniformity are required to optimise economic returns. However, sprinkler irrigation systems used for lettuce production in the Lockyer Valley, Australia commonly operate with low uniformity. Despite lettuce being a relatively high value crop there appears to be little evidence that growers in this region identify low application uniformities as a constraint to either crop production or economic returns. Local relationships between marketable lettuce yield and water application for two seasons were obtained from previous field trials. These relationships were used to model the field scale crop yields and returns for irrigation systems operating with various application uniformities and under different in-season rainfalls. Implications for identifying optimum levels of irrigation system performance with in-season rainfall are discussed.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Authors retain copyright.
Depositing User: Prof Rod Smith
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 22 Feb 2012 03:06
Last Modified: 02 Jul 2013 23:34
Uncontrolled Keywords: lettuce; sprinkler; irrigation uniformity; rainfall; returns
Fields of Research (FOR2008): 09 Engineering > 0999 Other Engineering > 099901 Agricultural Engineering
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
Socio-Economic Objective (SEO2008): B Economic Development > 82 Plant Production and Plant Primary Products > 8298 Environmentally Sustainable Plant Production > 829805 Management of Water Consumption by Plant Production
URI: http://eprints.usq.edu.au/id/eprint/6516

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