Zinc heptahydrate is a ZnSO4.7H2O compound. There are two types available: 21% Zn (crystalline) and 33% Zn (granular). Its use is aimed at the immediate prevention and/or correction of zinc deficienceis, which are mainly observed in soils with high pH and high concentrations of copper, magnesium, potassium, calcium and phosphorus.
Zinc (Zn) 33% – granular form
Zinc (Zn) 21% – crystalline form
Foliar application: 150-300 gr/100 Lt
Drip irrigation: 300 gr -1 kg/acre