Groundnut is an important oilseed crop grown widely in India during kharif, rabi, and summer seasons. Proper fertilizer management is essential in groundnut because it directly affects plant growth, pod formation, kernel quality, and final yield. Many farmers apply either too much or too little fertilizer, which leads to poor crop performance. Understanding the recommended fertilizer dose and applying it correctly helps farmers get better yield and good-quality groundnuts.
Groundnut grows best in well-drained, loose, and fertile soils such as sandy loam or loamy soil. Before sowing, the field should be well prepared to allow easy root growth and pod development. Adding well-decomposed farmyard manure or compost during land preparation improves soil structure, increases organic matter, and provides basic nutrients. Organic manure also helps in better moisture retention and supports beneficial soil organisms.
Groundnut, being a legume crop, has the ability to fix atmospheric nitrogen through root nodules. Because of this, it does not require a heavy dose of nitrogen fertilizer. A small starter dose of nitrogen is usually sufficient during early growth stages until nodules become active. Excess nitrogen should be avoided, as it leads to excessive vegetative growth and reduces pod formation.
Phosphorus is one of the most important nutrients for groundnut. It helps in root development, nodule formation, flowering, and pod development. Phosphorus deficiency results in poor root growth, fewer pods, and low yield. Therefore, phosphorus should be applied as a basal dose before sowing and mixed well into the soil.
Potassium plays a key role in improving plant strength, disease resistance, and drought tolerance. It also helps in proper kernel filling and improves oil content. In soils low in potassium, applying this nutrient significantly improves yield and quality.
Calcium is extremely important in groundnut cultivation, especially during pegging and pod development stages. Groundnut pods develop underground, and calcium is required directly in the pod zone. Calcium deficiency leads to empty pods and poor kernel development. Applying calcium-containing materials in the root and pod zone improves pod filling and reduces hollow kernels.
Sulphur is another important nutrient for groundnut. It plays a major role in protein and oil synthesis. Sulphur deficiency causes pale leaves and poor growth. Applying sulphur improves seed quality and oil content.
Groundnut is also sensitive to micronutrient deficiencies, especially zinc and boron. Zinc deficiency results in stunted growth and yellowing of leaves, while boron deficiency affects flowering and pod formation. Foliar spraying of micronutrients helps correct deficiencies quickly when symptoms appear.
The method and timing of fertilizer application are very important. Most fertilizers should be applied as a basal dose before sowing. Nitrogen, if applied, should be given in a small quantity at sowing. Calcium and sulphur should be available in the pod zone during flowering and pegging stages.
Irrigation management supports fertilizer efficiency. Adequate moisture is required for nutrient uptake, especially during flowering, pegging, and pod development. Water stress during these stages reduces yield.
Soil testing is highly recommended before deciding fertilizer dose. It helps farmers apply nutrients based on actual soil requirement rather than guesswork.
In conclusion, the recommended fertilizer management for groundnut includes use of organic manure, a small dose of nitrogen, adequate phosphorus and potassium, sufficient calcium and sulphur, and correction of micronutrient deficiencies. Balanced nutrition, combined with proper irrigation and good field management, helps groundnut plants grow healthy, produce well-filled pods, and give higher yield with better quality.
