Achieving the highest possible yield of agricultural crops means using large amounts of mineral fertilizers in order to maximize the physical, chemical and biological potentials of the soil. The largest threat to the quality of soil and water is represented by nitrogen fertilizers, and especially the nitrate form. The research was conducted in the period from 2016 to 2018 at six locations in the area of Biđ field with the aim of determining water flow and nitrate transport by installing lysimeters on different soil types. Potential threat of groundwater pollution with nitrates will be determined by the analysis of agricultural production. For this purpose, a detailed physical and chemical analysis of soil samples was performed. The dynamics of nitrogen compounds concentrations (NO3-N and NH4-N) in leachate, monitoring of the quantity and quality of leachate, and analysis of agricultural production were monitored. During the research period, different field crops were grown on the locations of the installed lysimeters: oats, oilseed rape, spelled, winter barley, sugar beet, alfalfa, soybean, sunflower. The concentration of nitrate nitrogen in zero tension lysimeters over a period of 3 years varied from 2.63 to 16.13 mg NO3-N / l, and the concentration of total nitrogen in percolate ranged from 2.70 to 16.16 mg N / l and have largely exceeded the MDK during 2016 and 2017. The nitrogen concentration from the ammonia varied from 0.02 to 0.14 mg NH4-N / l. Maximum leaching of nitrogen through leachate from the soil washed about 17.5 kg N / ha or 12.0%, and 0.421 kg P / ha or 0.49% of the amount added through fertilization, which was determined during 2016. The obtained results indicate the danger of transport of nitrogen compounds to groundwater in cases of increased application of mineral fertilizers, after which there is an increased amount of precipitation. Keywords: nitrates,