When should the first irrigation be applied in wheat crop?

Irrigation plays a very important role in wheat cultivation, especially in areas where winter rainfall is low or uncertain. Among all irrigations given during the season, the first irrigation is the most important because it directly affects tillering, root development, and the final yield. Farmers often say that missing the first irrigation can reduce the crop’s potential even if later irrigations are given on time. Understanding the correct time for the first irrigation helps ensure a strong foundation for the wheat crop.
The first irrigation in wheat should be applied at the Crown Root Initiation (CRI) stage, which generally occurs around 20–25 days after sowing. This is the stage when the wheat plant begins forming its secondary roots. These roots help the plant absorb water and nutrients more effectively throughout the season. If the soil becomes dry at this stage, the roots do not develop properly, and the crop becomes weak from the beginning.
Applying irrigation at the CRI stage helps support good tiller formation. Tillers are the side shoots that develop from the base of the plant and later form ears of grain. A healthy wheat crop requires sufficient tillers, and this is only possible when the plant has enough moisture at the right time. Missing the first irrigation greatly reduces the number of productive tillers, and the final yield may drop significantly.
The exact timing for the first irrigation may vary depending on sowing date, soil type, and weather conditions. For example, in sandy or light soils, moisture dries up quickly, so farmers may need to irrigate closer to 18–20 days after sowing. In heavier clay soils, moisture stays longer, so irrigation around 22–25 days is usually ideal. If there is a spell of rainfall during this period, irrigation may not be needed immediately, but the crop should be inspected to ensure that moisture is sufficient.
The first irrigation should be light and uniform. Over-irrigation at this stage can harm germinating roots and create waterlogging, which slows growth and increases the chances of diseases like root rot. Flooding the field can also damage young plants. The water level should be kept just enough to moisten the active root zone.
Proper land leveling helps ensure uniform water distribution. Uneven fields cause some plants to receive too much water while others remain dry, affecting the overall growth. Preparing small irrigation channels also helps guide the water properly around the field.
The timing of the first irrigation becomes even more critical in late-sown wheat. Late sowing shortens the vegetative period, so applying irrigation exactly at the CRI stage helps the crop compensate by producing more tillers in a shorter time. Without timely irrigation, late-sown wheat often remains short and develops fewer ears.
In simple words, the first irrigation in wheat should always be applied around 20–25 days after sowing, during the Crown Root Initiation stage. This irrigation is essential for strong root growth, good tillering, and healthy plant development. By giving the first irrigation at the right time, farmers ensure a strong start for the wheat crop, leading to better yields and higher profits at harvest.