Sulphur is an important nutrient required for healthy crop growth, yet many farmers in India tend to overlook it. Just like nitrogen, phosphorus, and potassium, sulphur plays a major role in improving yield and quality. Over the years, sulphur deficiency has increased in many fields because of continuous cropping and the use of fertilizers that do not contain sulphur. Understanding the recommended sulphur dose helps farmers improve crop health and get better production.
Sulphur helps in forming proteins, improving oil content, enhancing grain quality, and strengthening plant growth. It is especially important for oilseed crops like mustard, groundnut, and sunflower, but even cereals, pulses, and vegetables need sulphur for balanced growth.
The recommended sulphur dose varies from crop to crop, depending on the nutrient requirement. Generally, most field crops require 20–40 kg sulphur per hectare. However, oilseed crops need a slightly higher amount because they use more sulphur during growth.
For oilseed crops such as mustard, sesame, sunflower, and groundnut, the recommended sulphur dose is typically 30–40 kg per hectare. Applying sulphur not only improves yield but also increases oil percentage, making the produce more valuable.
For cereal crops like wheat, rice, and maize, a dose of 15–25 kg sulphur per hectare is usually sufficient. Sulphur helps improve grain filling, grain size, and protein quality in cereals.
For pulses such as chickpea, lentil, moong, and urad, sulphur is essential for better nodulation and protein formation. These crops generally require 20–25 kg sulphur per hectare.
For vegetable crops like onion, garlic, cabbage, cauliflower, and tomato, a dose of 20–30 kg sulphur per hectare gives good results. Sulphur enhances colour, flavour, and storage quality, especially in onion and garlic.
The source of sulphur is also important. Farmers can apply sulphur through fertilizers such as:
Gypsum (contains around 15–17% sulphur)
Single Super Phosphate (SSP) (contains both phosphorus and sulphur)
Elemental sulphur (90% sulphur, slow release)
Sulphate of Potash (SOP)
Ammonium sulphate
SSP is a good option for farmers because it supplies both phosphorus and sulphur at the same time. Gypsum is commonly used in oilseed crops and for improving soil structure. Elemental sulphur is used when long-term correction of sulphur deficiency is needed.
Sulphur deficiency appears as yellowing of young leaves, stunted growth, and poor crop vigour. If these symptoms appear, applying sulphur immediately can correct the deficiency.
It is best to apply sulphur basally, meaning before or at the time of sowing. Some forms of sulphur, like elemental sulphur, release slowly and should be applied early. Water-soluble forms, such as sulphates, act faster and can be used during crop growth if needed.
Farmers should also consider their soil type. Sandy soils lose sulphur easily, so they may need more frequent application. Heavier soils hold sulphur better and may require lower doses.
By applying the recommended sulphur dose based on the crop type and soil condition, farmers can significantly improve crop yield, quality, and overall field productivity. Balanced nutrition, including sulphur, ensures healthier crops and better income for the farming family.
