BUZZ-Chile's SQM up after Potash Corp and Agrium announce merger talks
** Chile fertilizer firm SQM's B shares and US-listed shares up over 3 pct after Potash Corp and Agrium say they are in merger talks
** Potash Corp is the world's biggest crop nutrient company by capacity and owns over 30 pct of SQM
** For more on the deal talks see
** Santiago's blue-chip IPSA index is flat
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