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Type: Vitamins, Minerals and Trace Elements

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