oh well carrying on now..., page-10

"Mr Mackenzie would not state that potash will become a 'fifth pillar' for the world's largest miner that's capable of delivering returns of the magnitude of its iron ore, oil, coal and copper assets. But the BHP chief executive did say he is "very optimistic" that it will " translate to many decades of very high return and attractive projects for the company".

http://www.businessspectator.com.au/news/2014/3/13/resources-and-energy/mackenzie-has-big-potash-hopes