Encanto Potash Corp V.EPO.H

Potash Companies

[Alpha101]

I have searched the world for potash companies.  I have removed, from the list, any companies in the exploration stage who are not potash suppliers or are so small that they are insignificant to our needs.  I left Compass in because I don't know them.  My guess is that our potash supplier(s) is in this lis..but which one?
I've removed Encanto from the list for the moment to reduce confusion.  I suggest eliminating Intrepid because, if I remember correctly, their production costs are too high for consideration.  Anybody want to offer a guess/opinion?

BHP Biliton Ltd                 BHP.AX

Rio Tinto Ltd.                RIO.AX

Potash Corp.                    POT.TO

Agrium Inc.                      AGU.TO

The Mosaic Company   MOS

Intrepid Potash                IPI

Beleruskali

Uralkali

ICL fertilizer                     ICL

Compass Minerals          CMP