The Port of Vancouver still wants potash.

More than three years after the world’s biggest mining company, BHP Billiton, selected the port as its preferred site for a facility to export potash — a crop nutrient — the two parties remain in negotiations over the terms of a long-term lease.

Theresa Wagner, the port’s communications manager, said this week that port Executive Director Todd Coleman is expected in February to extend talks to mid-May. The hope is to have a final, 30-year lease agreement in place by mid-2014, Wagner said.

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