Submitted on: 25 April 2010.
Revised on: 08 June 2010.
Accepted on: 22 July 2010.
___________________Agricultural Water Management---ELSEVIER
Submitted on: 16 June 2010.
Revised on: 13 October 2010.
Accepted on: 07 December 2010.
___________________Agricultural Water Management---ELSEVIER
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Submitted on: 01 January 2005.
Revised on: 18 February 2005.
Accepted on: 05 March 2005.
___________________Agricultural Water Management---ELSEVIER