Groundnut is an important oilseed and food crop grown widely across India. Good nutrient management is one of the key factors that decides the yield and quality of groundnut. Many farmers face problems like poor pod formation, yellowing of leaves, or low kernel weight mainly due to improper nutrient use. Managing nutrients in the right way helps the crop grow healthy, fix nitrogen efficiently, and produce well-filled pods.
The first step in nutrient management is soil preparation. Groundnut grows best in light, well-drained sandy loam or loamy soils. Before sowing, the field should be well prepared and free from weeds. If possible, soil testing should be done to understand nutrient status. This helps farmers apply only the required fertilizers and avoid unnecessary expenses.
Organic manure plays an important role in groundnut cultivation. Applying well-decomposed farmyard manure or compost improves soil structure and microbial activity. About 5 to 10 tonnes of farmyard manure per hectare applied during land preparation helps retain moisture and supports better root and peg development. Organic matter also improves nutrient availability to the crop.
Groundnut is a legume crop and has the ability to fix nitrogen from the air through root nodules. Because of this, it does not need heavy nitrogen application. A small starter dose of nitrogen at sowing helps early plant growth until nodules become active. Excess nitrogen should be avoided, as it promotes more leaf growth and reduces pod formation.
Phosphorus is very important for groundnut. It helps in root development, nodule formation, flowering, and pod development. Phosphorus should be applied as a basal dose at sowing time so that roots can access it easily. Proper phosphorus nutrition results in better peg penetration and higher pod yield.
Potassium strengthens plants and improves resistance to drought and diseases. In potassium-deficient soils, applying potash helps in better kernel filling and improves oil content. Potassium is usually applied along with phosphorus at sowing.
Calcium is one of the most critical nutrients for groundnut, especially during flowering and pod formation. Calcium deficiency leads to empty or poorly filled pods. Since pods develop below the soil surface, calcium must be available in the pod zone. Applying gypsum around flowering time supplies calcium and sulfur, which greatly improves pod filling and yield.
Sulfur is also important for oilseed crops like groundnut. It supports oil formation and improves seed quality. Gypsum application helps meet sulfur requirement as well. In some soils, deficiencies of micronutrients like zinc, boron, or iron may appear. Iron deficiency causes yellowing between leaf veins, especially in alkaline soils. Foliar sprays help correct such deficiencies quickly.
Water management is closely linked with nutrient use. Proper soil moisture helps nutrients move to plant roots. Over-irrigation should be avoided, as it leads to nutrient loss and poor root health. Light and timely irrigation during flowering and pod formation stages helps improve nutrient uptake.
In summary, nutrient management in groundnut should focus on balanced and timely supply rather than heavy fertilizer use. Use of organic manure, proper phosphorus and potassium application, timely gypsum use, and care for micronutrients are key practices. By following these simple steps, farmers can achieve healthy crop growth, better pod filling, and higher groundnut yields.
