Sulphuric Acid (H₂SO₄) is a strong mineral acid widely used in agriculture as a soil amendment, water pH regulator, and nutrient enhancer. It helps in neutralizing alkaline soils, improves the availability of phosphorus and micronutrients, and supplies sulphur in a readily usable form to plants. In fertigation, sulphuric acid not only provides nutrients but also cleans irrigation lines by dissolving carbonates and bicarbonates, making it an essential input for modern farming practices.