Zinc Sulphate Uses in Agriculture: A Complete Guide

Published on: 2026-05-05 | Author: Chakradhar Chemicals | Read time: 6 min read

Zinc is one of the most essential micronutrients for plant growth. Zinc Sulphate, particularly in its Monohydrate and Heptahydrate forms, plays a critical role in modern agriculture by addressing zinc deficiency in soils, a widespread issue affecting crop productivity across India.

Why Zinc Matters for Crops

Zinc is required for the synthesis of proteins, enzymes, and growth hormones in plants. A deficiency in zinc leads to stunted growth, delayed maturity, poor grain quality, and significantly reduced yields. According to the Indian Institute of Soil Science, nearly 50% of Indian soils are zinc-deficient.

How Zinc Sulphate Is Applied

• Soil Application: 20–25 kg of Zinc Sulphate Monohydrate per hectare, mixed with soil before sowing.
• Foliar Spray: 0.5% Zinc Sulphate solution sprayed on leaves during the vegetative growth stage.
• Seed Treatment: Seeds are soaked in Zinc Sulphate solution before planting to ensure early zinc availability.

Crops That Benefit Most

Rice, wheat, maize, cotton, sugarcane, citrus fruits, and pulses are among the crops that respond most positively to zinc supplementation. In rice cultivation alone, zinc application can increase yields by 15–20%.

Monohydrate vs Heptahydrate: Which to Use?

Zinc Sulphate Monohydrate (33% Zn) is preferred for soil application due to its higher zinc content per unit weight and lower moisture. Zinc Sulphate Heptahydrate (21% Zn) dissolves faster and is ideal for foliar sprays and fertigation systems.

Chakradhar's Agricultural-Grade Zinc Sulphate

At Chakradhar Chemicals, we manufacture high-purity Zinc Sulphate Monohydrate in powder, coarse, and granulated forms, all meeting stringent quality standards. With a production capacity of 30,000+ MTPA, we are one of India's largest and most trusted suppliers to the agricultural sector.