SOP Magnesia June 1, 2018Great Lakes, Market Watch, Southern Plains, Sulfate of Potash Magnesiamickeybarb@charter.net Great Lakes: SOP Magnesia was pegged at $320-$345/st FOB inThis content is restricted to site members. If you are an existing user, please log in. If you would like to Subscribe please go to the 'Subscribe' area from the main menu.