the current potash over-supplied, and BHP wants to spend $2.6 Bil. to increase the supply side in 2017 ? the number of hecta of farmland in the world is shrinking and you can only apply so much ferterlizer to the land every year. why do you want to invest more resource to get less in return ?? basic economic model only works for an average intelligent people.. not dumb azzes..
So BHP says that maybe they will be producing potash in 2020 if the economics justify it but you know better what they will do and expect them to get cracking in 4 years when all they say they will have is a shaft or two. Into the dumpster pile you go too as terminal inexactitude is too generous a formulation for what you have to say.
Get your facts straight. They are going to be working on 2 shafts with completion of the shafts not until 2016 with work overs going into 2017. No way will they be producing anything by 2016 other than expenses.