Like most other plants, cereals also require nitrogen throughout the vegetation period. In the initial stages of development, the plants are poorly developed and have a lower root mass. Accordingly, at this stage of development, they are able to uptake a smaller amount of nitrogen because it is easily soluble and some of its forms do not bind in the soil but rapidly fall deeper into the soil, under the reach of a young rootstock. When planning nitrogen fertilization, it is important to note that it is necessary to provide larger quantities of nitrogen fertilizers in the phase of intensive plant growth (spinning phase - stretching of the stem). That is why nitrogen supplements should be timed to ensure the continuous supply of nitrogen to the plants throughout the spring period. This will be achieved by repeated application of nitrogen fertilizers, namely 3 - 4 times, depending on the availability of nitrogen and the length of plant vegetation. The usability of nitrogen from mineral fertilizers is 50% on average, and the increase in usability can be obtained by using less nitrogen on multiple occasions.