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Submitted on: 28 June 1998.
Revised on: 16 September 1998.
Accepted on: 16 October 1998.
___________________Agricultural Water Management---ELSEVIER
Submitted on: 24 April 2004.
Revised on: 27 June 2004.
Accepted on: 15 August 2004.
___________________Agricultural Water Management---ELSEVIER
Submitted on: 21 November 2011.
Revised on: 18 March 2012.
Accepted on: 02 May 2012.
___________________Agricultural Water Management---ELSEVIER
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