In the village In Vesele, Volyn region, an experiment was established to compare the yield of corn per grain using liquid complex fertilizer Liqa K+ 5:20:5 and Liqa K+ 5:20:5 Zn at the rate of 40 kg/ha in comparison with the control. A parallel study of the performance of Liqa S 8:24 and Liqa S+ 8:24 Zn products was also initiated.