Muriate of potash is the most cost-effective source of potassium and is suitable for replenishing the potassium-depleted soils of all the types. It is recommended for application to most grain, oilseed, sacchariferous and fibre crops with a high need for potassium and a low sensitivity to chlorine, as well as for an annual soil fertilization in order to maintain the potassium content at the optimum level.