How to manage nutrients in crops?

Nutrient management is one of the most important practices for successful crop production. Crops need a balanced supply of nutrients to grow well, fight diseases, and give good yield. When nutrients are not managed properly, plants become weak, growth slows down, and productivity decreases. By understanding how and when to apply nutrients, farmers can improve soil health and increase farm income.
The first step in nutrient management is soil testing. Soil testing helps farmers know the existing nutrient levels in their field. It shows whether the soil lacks nitrogen, phosphorus, potassium, or micronutrients like zinc, boron, and iron. Based on the soil test report, farmers can use the right type and quantity of fertilizers. This avoids both overuse and underuse of nutrients.
Adding organic matter is a key part of nutrient management. Organic sources like farmyard manure (FYM), compost, and green manure improve soil structure and help hold nutrients for a longer time. They also support beneficial microorganisms in the soil. Applying 5–10 tonnes of FYM per acre before sowing helps crops get a steady supply of nutrients throughout the season.
Plants need three major nutrients: Nitrogen (N), Phosphorus (P), and Potassium (K). Nitrogen promotes green leaf growth, phosphorus supports root development, and potassium helps in disease resistance and grain formation. Instead of applying all nutrients at once, farmers should apply nitrogen in split doses. One part is given at sowing, another during early growth, and the last during flowering. This ensures the crop receives nitrogen when it needs it the most.
Phosphorus and potassium should usually be applied basally, meaning before or at the time of sowing. These nutrients help young plants establish strong roots and improve overall growth. Using fertilizers like DAP, SSP, or MOP based on soil recommendation gives good results.
Micronutrients may be required in small quantities, but they are essential for crop health. Common deficiencies include zinc deficiency in paddy and iron deficiency in leafy crops. Farmers can apply micronutrient mixtures either through soil application or foliar sprays. Foliar sprays are especially useful because plants absorb the nutrients quickly through their leaves.
Proper irrigation management helps nutrients reach the roots. Applying fertilizers on dry soil reduces their effectiveness. Irrigation after fertilizer application allows nutrients to dissolve and move into the root zone. However, over-irrigation should be avoided because it can wash away nutrients, especially nitrogen.
Crop rotation is another effective practice. Growing legumes like moong, urad, or cowpea before cereals helps add natural nitrogen to the soil. This reduces the need for chemical nitrogen fertilizers in the next crop. Mixed cropping and intercropping also help maintain soil fertility.
Weed control is important for nutrient management because weeds compete with the main crop for nutrients. Removing weeds in the early stages ensures that the crop receives maximum benefit from fertilizers.
In simple words, nutrient management in crops involves soil testing, adding organic matter, applying balanced NPK fertilizers, using micronutrients when needed, giving nitrogen in splits, managing irrigation properly, rotating crops, and controlling weeds. By following these practices, farmers can improve soil fertility, strengthen crop growth, and achieve higher and more sustainable yields.