Efficient Use of Solid and Water Soluble Fertilizers for Corn Production in the Northern Part of Steppe Zone of Ukraine

A high efficiency of fertigation was established after three years of research at an ordinary chernozem on the production of corn hybrid D 4351 instead of traditional mineral fertilizing methods. Nitrates are washed out of the root layer after spreading urea on the soil surface before the cultivation in the spring. The nitrate content in the soil in the last two phases was 16-26% higher than in the 5-6 leaf phase after applying the KAC -32 solution with a sprayer on the soil surface.The mass of 1000 grains was the highest after several times urea application in dose N200 depending on irrigation rate. The maximum yield of corn grain was obtained by applying urea with rate N200 and -32 with irrigation water during corn vegetation period. There is a tendency to increase the protein in corn grain during fertigation with urea and -32. The data obtained show that the combination of irrigation with mineral fertilizer application is an effective way to save energy and material resources, increase the yield and grain quality.