There are produces two types of muriate of potash (MOP): pink and white. Pink MOP can be standard and granular: Pink Standard MOP is used for producing compound NPK fertilizers and as a direct-application fertilizer. Pink Granular MOP is used as a direct-application fertilizer and as a component of blended fertilizers. Also known as Potassium Chloride (KCl), MOP is the main Potassium product and the predominant source of K2O in fertilizers
Potassium stimulates the growth of strong stems and gives the plant some disease resistance by promoting thickness of the outer cell walls. Adequate potassium can reduce moisture loss from growing plants, thereby giving some drought resistance.