Submitted on: 11 August 1999.
Revised on: 03 October 1999.
Accepted on: 13 November 1999.
___________________EUROPEAN JOURNAL OF AGRONOMY---ELSEVIER
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Submitted on: 28 June 2011.
Revised on: 23 July 2011.
Accepted on: 07 August 2011.
___________________EUROPEAN JOURNAL OF AGRONOMY---ELSEVIER
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Submitted on: 23 April 2021.
Revised on: 22 July 2021.
Accepted on: 08 August 2021.
___________________EUROPEAN JOURNAL OF AGRONOMY---ELSEVIER
Submitted on: 16 May 2007.
Revised on: 24 August 2007.
Accepted on: 09 October 2007.
___________________EUROPEAN JOURNAL OF AGRONOMY---ELSEVIER
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