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Submitted on: 27 January 2016.
Revised on: 06 March 2016.
Accepted on: 31 March 2016.
TROPICAL AGRICULTURE---TROPICAL AGRICULTURE
Submitted on: 22 July 2005.
Revised on: 16 August 2005.
Accepted on: 02 September 2005.
TROPICAL AGRICULTURE---TROPICAL AGRICULTURE
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