The article reports on increase in the production of the potassium oxide (K2O) across the world in 2017 along with the shift of the companies in U.S. to producing sulfate of potash (SOP). Topics discussed include potassium as nutrient for plant growth and maturation, muriate of potash (MOP) capacity controlled by potash firm Agrium Inc., and Potash Corp. of Saskatchewan, and modernization of its processing facilities and construction of mines.