Polyhalite is an evaporite mineral comprising hydrated sulphates of potassium, calcium and magnesium, with the chemical formula K2Ca2Mg(SO4)4·2(H2O). Plant nutrients are presented as sulphates. Polyhalite in this presentation is a low carbon footprint high nutrient content fertiliser.
Poly 4 is a granular presentation of micronized Polyhalite suitable for common agricultural fertiliser spreaders.
· Product solubility
· Nutrient release rates have been characterised
· Macro nutrient and trace nutrient content has been defined
· Poly 4 spread pattern has been independently tested
· Salt index defined
· Neutral pH