Abstract. Nowadays, phosphorus fertilizers are applied to winter wheat in all farms of the Republic in unscientifically unfounded terms and conditions. Because no scientific research has been conducted in this regard. In addition, it is observed that phosphorus fertilizers are used in autumn wheat planted between rows of cotton, after planting, and in other periods of wheat, depending on the possibility of the farmer. This indicates that the efficiency of the used fertilizers decreases and that winter wheat is almost not using phosphorus. Therefore, scientific substantiation of acceptable norms and terms of application of phosphorus fertilizers is an urgent issue of today.