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Zinc Sulphate Monohydrate is used as a fertiliser additive for preventing and correcting zinc deficiencies in crops. Zinc (Zn) is important for enzyme activity associated with carbohydrate metabolism in plants.
There are various strategies for applying zinc. It can be applied at a high rate, intended lo last several years, or at lower rates on an annual basis, e.g. each time a crop is sown, or once a year in tree, plantation and vine crops, e.g. in the spring, at the start of the main growing season. Alternatively, it may be applied at lower rates but on a more regular basis in NPK fertiliser blends throughout the growing season, so that the cumulative rate per annum is much the same as where a single application is made.