This study examined the impact of nitrogen applied at booting stage on grain yield, protein content, grain N uptake, and nitrogen recovery efficiency (NRE) of common winter wheat (Triticum aestivum L.) in Transylvanian Plain, in the period 2019-2026. The experiment included eight consecutively years, four varieties and, two nitrogen doses: N50 and N100. In the variant of fertilization N50, 50 kg ha-1 nitrogen active substance were applied in autumn before sowing as basic fertilization and in the variant N100, other 50 kg ha-1 nitrogen were applied at the booting stage in addition to the base fertilization. Our research has shown that, compared to other wheat growth stages, applying nitrogen at the booting stage (one week before heading) significantly improved yield and protein content. Nitrogen applied at the booting stage conducted to an increase of yield by an average of 763 kg ha⁻¹ and in grain protein content by 2.24%. The NRE values for all the studied varieties indicate an efficient utilization of nitrogen fertilizers applied at the booting stage, except the years marked by drought in May, such as 2019/2020 or when drought from June is accompanied by scorching heat, such as 2023/2024.