Shares of global potash producers rose on Thursday after the United States imposed sanctions against Belarus’ exporter, which accounts for 16% of global production, along with wide sanctions against other firms and officials of the country. Belarus Potash Company (BPC) is the exporting arm of Belarusian state potash producer Belaruskali and is Minsk’s main foreign currency earner. The U.S. Treasury said on Thursday that it issued a general license authorising wind down of transactions involving BPC until April 1.