Mustard is an important oilseed crop grown widely in India, and proper nutrient management at the early stages is very important for good plant growth and higher yield. One of the most critical times for fertilizer application in mustard is during the first irrigation, also known as the first water. Many farmers ask what fertilizer should be given at this stage so that the crop grows strong and healthy.
The first irrigation in mustard is usually given 20 to 25 days after sowing, depending on soil moisture and weather conditions. By this time, the crop has established its roots and enters the active vegetative growth stage. Nutrient demand increases during this period, especially for nitrogen, which supports leaf growth and branching.
The most important fertilizer to apply with the first irrigation in mustard is nitrogen. Nitrogen helps in rapid vegetative growth, increases the number of branches, and supports better flowering later. If nitrogen is not supplied at the right time, plants remain weak, pale, and produce fewer branches, which directly affects yield.
Generally, mustard requires nitrogen in split doses. A part of nitrogen is applied as a basal dose at the time of sowing, and the remaining nitrogen should be applied with the first irrigation. Urea is the most commonly used nitrogen fertilizer for this purpose. Applying urea with the first irrigation ensures that nitrogen reaches the root zone properly and is absorbed efficiently by the plants.
In fields where basal fertilizer application was not done properly at sowing, nitrogen application at first irrigation becomes even more important. However, excess nitrogen should be avoided, as it can lead to excessive vegetative growth, delayed flowering, and increased pest and disease problems.
Along with nitrogen, farmers often ask whether phosphorus or potassium should be applied at first irrigation. Phosphorus is very important for root development and early plant growth, but it is usually applied as a basal dose at sowing because it does not move easily in the soil. Applying phosphorus with irrigation is less effective. Therefore, if phosphorus was already applied at sowing, it is not necessary to apply it again at first irrigation.
Potassium helps strengthen plants and improves resistance to stress and diseases. In soils that are low in potassium, potash should also be applied as a basal dose. Potassium is not commonly applied with first irrigation unless soil tests show deficiency.
Sulfur is a very important nutrient for mustard, as it improves oil content and overall plant health. Sulfur is generally applied at sowing, but in sulfur-deficient soils, top dressing before or at first irrigation can be beneficial. Sulfur-containing fertilizers help improve crop vigour and yield.
Before applying fertilizer with first irrigation, farmers should ensure that the field is level and irrigation water flows evenly. Fertilizer should be broadcast uniformly so that nutrients are distributed properly. Applying fertilizer just before irrigation helps dissolve nutrients and move them into the root zone.
In conclusion, the best fertilizer to give while giving the first water in mustard is nitrogen, mainly through urea, as part of split application. This supports strong vegetative growth and better yield potential. Balanced nutrition, correct timing, and proper irrigation together help mustard crops grow healthy and productive.
