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Relevance. The relevance of the article lies in the analysis and study of modern forms of nitrogen fertilizers in the mineral nutrition of potatoes. This research direction is driven by the emergence of diverse forms on the mineral fertilizer market. Methodology. The article presents comparative data on the effects of traditional nitrogen fertilizers (ammonium nitrate, calcium nitrate, ammonium sulfate, urea, liquid ammonia, ammonia water) and relatively new developments (stabilized urea UTEK, nitrogen-limestone fertilizer (UAI), nitrogen fertilizers with sulfur additives such as UAN+S, sulfonitrate, etc.). The article shows the results of field experiments (2020-2022) to assess the effectiveness of root dressings with some of the above forms: ammonium nitrate, inhibited urea UTEK, nitrogen-limestone fertilizer (UAI), on domestic potato varieties – maturing Udacha, Meteor, Zhukovsky and mid-season Favorit, Grand. Standard research methods were used in setting up and conducting the shortterm field experiments. Results. The system of mineral nutrition of potatoes, combining the main application of complex NPK fertilizers (nitroammophoska 14:14:23 or diammophoska 10:26:26, etc.) before planting in moderate doses (N40-56P56-104K92-104) with root nitrogen fertilizing in doses not exceeding N100 in the initial period of vegetation (plant height 10-15 cm – beginning of budding) with modernized forms of nitrogen fertilizers (inhibited urea UTEK) or nitrogen-limestone fertilizer (UAI), is capable of fully revealing the potential of potato varieties. It was found that when growing domestic potato varieties on sod-podzolic sandy loam soil, the yield increase from nitrogen top dressing at a rate of N100 was: for early varieties (Udacha, Meteor, Zhukovsky early) 3.0-8.8 t/ha or 7-25%, and for mid-late varieties (Grand, Favorit) 3.0-7.7 t/ha or 11-20% over the mineral background (N56P56K92), where the yield level reached 27-32 t/ha. Root nitrogen top dressings contributed to a significant increase in potato yield and marketability, with no observed "growth dilution" of nutrients in the produce.