Submitted on: 01 September 2002.
Revised on: 25 November 2002.
Accepted on: 11 January 2003.
___________________JOURNAL OF AGRICULTURAL BIOLOGICAL AND ENVIRONMENTAL STATISTICS
Submitted on: 22 November 2006.
Revised on: 31 January 2007.
Accepted on: 20 March 2007.
___________________JOURNAL OF AGRICULTURAL BIOLOGICAL AND ENVIRONMENTAL STATISTICS
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