RE:RE:RE:RE:RE:Things That Didn't Exist 60 Years AgoSelective dissolution mining works for potash despite what some might write here, it's simple chemistry after all. What is critical though is the grade. Anyting less than 30% makes the process problematic and ore bodies at 25-27% don't have a chance. Regarless of comments, I'm taking the big picture view of the industry. All of us here know where this is going