Russian billionaire Andrey Melnichenko, whose fertilizer company is investing more than $6-billion in potash mining, said it could take at least a decade for the potash market to work off the excess because of the past “disruptive” actions by the largest sellers. Potash prices have collapsed since 2013, when a trade pact between Russian and Belarusian producers, which helped prop up the market, fell apart. At the time, Canpotex Ltd., a Canadian potash exporter, and Belarusian Potash Co. controlled about 80% of global exports.
