In fact, intensive crops such as market gardening, nuts or tobacco require the use of sulphates fertilizers. Potato and corn crops are also users of this type of fertilizer.
Indeed, these different crops require potassium additions, but given the frequency of application required, it is impossible to use Potassium Chloride (“KCl”) commonly called “Potash”. The presence of chloride in potash is harmful to soils as it tends to accumulate and sterilize soils. Yields are therefore diminished over time and eventually become sterile.
The use of SOP or SOPM makes it possible to fill the potassium and magnesium requirements in the soil while avoiding the accumulation of chloride.