Value Microcaps Junior Miners

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Most potash is extracted by conventional underground mining methods. Solution mining is used when underground deposits are irregular and very deep. The other main production method involves the evaporation of brines in shallow salt lakes, followed by the harvesting of potassium minerals.
http://www.encyclopedia.com/doc/1P3-657775161.html

There is no 'problem'. In fact they have spoken about the strong possibility of using the evaporation method, which is the cheapest because of the prime location of the potash deposit.