Farmers across Gujarat and India lose a major portion of their harvest every year due to a lack of micronutrient Zinc. Zinc plays a direct role in how well crops grow and how much they yield. Zinc sulphate fertilizer supplies zinc to your crops so they grow properly, produce good yields, and handle stress effectively. Whether you grow wheat, rice, maize, or vegetables, zinc sulphate fertilizer works for all. This blog covers why Zinc Sulphate fertilizer is necessary and how to use it for maximum yield. What Is Zinc Sulphate Fertilizer? Zinc sulphate contains Zinc, Sulphur, and Oxygen. Zinc sulphate fertilizer is a water-soluble micronutrient fertilizer that supplies zinc directly to plants and soil. It comes in two common grades: 21% zinc (heptahydrate) and 33% zinc (monohydrate). The 21% grade works well for both soil application and foliar spray. The 33% grade is more concentrated and mainly used for soil application. Role of Zinc? Zinc plays a key role in crop health and growth: Controls and regulates metabolic activities. Helps produce auxins, the natural hormones that drive plant growth. Important for photosynthesis and nitrogen use in the plant Proper flowering and fruiting, and better yield. Zinc Deficiency in Indian Soils: Why Crops Are Suffering Over half of India's agricultural soils are estimated to be low in Zinc. Gujarat has calcareous and alkaline soils that are prone to Zinc deficiency. Sign of Zinc Deficiencies Older leaves develop light green or yellow spots between the veins. Stunted growth and internodes are short. Maize and sugarcane show yellow striping on leaves, which turns white when severe. Rice leaves turn rusty brown, a condition commonly known as khaira disease Cotton leaves have bronze discolouration on the surface. Soybean plants remain stunted with pale green to yellow leaves. Rusty brown and bronze signs on leaves. Small fruits, low yields, or poor grain development indicate zinc deficiency. Benefits of Zinc Sulphate Fertilizer for Crops Each of these benefits adds up to one result — better harvest. Learn how the right micronutrient can improve crop yield when combined with organic nutrition. Better Yield Zinc activates key enzymes and improves photosynthesis. This directly increases grain and fruit size. Stronger Roots Zinc strengthens roots, increasing drought tolerance in crops. Improved Grain Quality Zinc-sufficient crops produce grains with higher protein content and better nutritional value. Faster Growth Crops reach maturity on time. Delayed growth is reduced significantly. Disease Resistance Adequate zinc improves the plant's natural immunity against fungal infections and stress. How to Use Zinc Sulphate Fertilizer in Agriculture Zinc sulphate is a versatile sulphate fertilizer used in Indian farming. The following are the ways to apply it across different crops: Soil Application This is a common and reliable method to mix 10 to 25 kg of zinc sulphate (21% grade) per acre into the soil before sowing or transplanting. Foliar Spray Dissolve 500 grams to 1 kg of zinc sulphate in 200 litres of water. Spray on leaves during the vegetative stage and add a small amount of lime to reduce leaf burn. Drip irrigation Zinc sulphate can be applied through drip irrigation. Use the 21% grade as it dissolves easily in water. Apply it during the early growth stage of the crop for best results. Soil Drench Soil drench means dissolving the zinc sulphate in water and pouring it near the base of plants. Dissolve 2–5 grams of zinc sulphate per litre of water. Slowly pour the solution around the root area, water lightly afterwards to allow the zinc to penetrate the soil. Seed treatment Soak seeds in a 0.1% zinc sulphate solution before sowing to give seedlings an early zinc boost. Crops that benefit from zinc sulphate fertilizer are rice, wheat, maize, sugarcane, cotton, groundnut, soybean, vegetables, and citrus fruits. These crops require a lot of zinc and respond quickly to its application. Best Time and Dose to Apply Zinc Sulphate Fertilizer Timing matters. Here is a simple guide: For soil application: Apply before sowing or transplanting, mixed with the top 6 to 8 inches of soil. For foliar spray: Apply at the early vegetative stage, around 15 to 25 days after sowing. Spray in the morning or evening to avoid leaf scorch. Recommended dosage per acre: Crop Soil Application Foliar Spray Rice / Wheat 10–25 kg 0.5% solution, 2–3 sprays Maize / Soybean 10–20 kg 0.5% solution, 2 sprays Vegetables 8–15 kg 0.3–0.5% solution Sugarcane / Cotton 15–25 kg 0.5% solution Always check your soil test report before deciding on the dose. Calcareous and alkaline soils often need higher doses because zinc binds with calcium and becomes unavailable to plants. Common Mistakes to Avoid When Using Zinc Sulphate Fertilizer Zinc sulphate is easy to use, but a few mistakes can reduce its effect: Avoid excessive zinc sulphate application to prevent leaf burn and nutrient uptake. Adhere to recommended doses. Check soil pH, in highly alkaline soils, combine zinc sulphate with sulphur or organic matter for better results. Always do a soil test because applying zinc sulphate to already zinc-rich soil is wasteful and can harm the crop. Avoid applying during heavy rain or extreme heat. Early morning application gives the best results Buying Guide: What to Check Before Buying Zinc Sulphate Fertilizer Not all Zinc sulphate fertilisers are equal. Here is what to check before buying: Grade and purity: Look for 21% zinc content (heptahydrate) for general use. It works for soil and foliar applications. The 33% grade (monohydrate) is better for soil-only use. Water solubility: Zinc sulphate dissolves completely in water without leaving a residue. This is important for foliar sprays and drip systems. Certification: For farmers who follow organic or sustainable farming practices, choose certified products that are approved for use in integrated nutrient management. Packaging: Buy from brands that offer properly sealed packaging to prevent moisture absorption. Trusted Source: Kama International Organic supplies quality micronutrient products for farmers across Gujarat and India. Choose suppliers who provide clear labelling, correct zinc content, and reliable agronomic support. Frequently Asked Questions about Zinc Sulphate Fertilizer: Uses, Dosage & How to Fix Zinc Deficiency in Crops What is zinc sulphate fertilizer? Zinc sulphate fertilizer is a water-soluble micronutrient fertilizer that supplies zinc to plants and soil, available in 21% and 33% zinc grades. What are the uses of zinc sulphate fertilizer in agriculture? Zinc sulphate fertilizer is used for soil application, foliar spray, seed treatment, and drip irrigation to fix zinc deficiency and improve crop growth and yield. How can zinc deficiency in crops be identified? Symptoms such as yellowing between leaf veins on young leaves, stunted growth, small fruits, and delayed maturity show zinc deficiency in crops. What are the symptoms of zinc deficiency in rice? Brown spots on lower leaves, poor tillering, and stunted plants are commonly known as khaira disease. Can zinc sulphate be used in organic farming? Zinc sulphate can be used in organic farming within approved guidelines and combined with organic nutrient management practices.