The move may be the first of many more competitive deals by producers in the potash market, which has historically operated with large joint ventures controlling prices.
The U.S. miner said the sale is part of a strategy to divest non-core assets and focus on supplying iron ore pellets to the North American steel industry.
The Great Barrier Reef is at risk of permanent damage should huge coalmining and a port development in Queensland go ahead, scientists say in a new report.
Coal mine fatalities in China dropped almost 87% to 931 last year from more than 7,000 casualties registered in the sector in 2002, according to official figures recently disclosed.
The copper price recovered from a one-month low on Wednesday to gain 3% on Thursday, as the metal markets reacted to a dovish Fed statement and news out of Indonesia that production has stopped at the Grasberg mine.