Corn is one of the most productive crops in modern agricultural production. Biological features of culture provide effective assimilation of elements of mineral nutrition from soil and carbon from the atmosphere, in the early phases of development of corn plants, however, are exposed to weather and agrotechnical factors that can significantly affect growth and developmentof this culture. Formation of the main productivity elements of corn plants there is in a phase of 4-6 leaves that occurs at the beginning - mid of May. Weather conditions of this spring are very specific, affecting the growth and development of crops, including corn. In some regions there are still moisture from the melting of snow, and some areas already have a severe lack of moisture. Plants that began to grow, stopped their growth that would not contribute to the formation of high yields. Unfortunately, for the next ten days, weather forecasters do not predict precipitation and decrease in temperatures, and therefore the moisture content of the plants will depend on the power of the root system, which in corn plants is formed in this phase (4-6 leaves). On some fields possible manifestations of visual signs of mineral nutrition elements deficiency, in particular nitrogen, potassium, zinc and phosphorus.
In order to remove the plants from the state of stress and to ensure activating of growth, we suggest during this period, to make foliar fertilizing with the production of the company Ecoorganic. Depending on the situation, it is recommended to use on each specific field: GROS Сorenerist (Root Growth) - a special fertilizer with phosphorus in the form of phosphite, amino acids and phytohormones in a dose of 1.0 - 1.5 l / ha; ECOLINE Universal Rist (Growth) Amino at a dose of 1.0 - 2, 0 l / ha - special antistressant fertilizer with high content of amino acids and balanced composition of macro and microelements for the removal of plants from the stress state and enhancement of growth processes; ECOLINE Phosphite K-Amino at a dose of 1.5 - 2.0 l / ha - a special formulation to overcome plant stress and increase the growth of the root system; ECOLINE Phosphite K in a dose of 1.5 - 2.0 l / ha + ECOLINE Zinc Chelate in a dose of 0.5 - 1.5 l / ha to eliminate the deficit of phosphorus, potassium and zinc, strengthening the growth of the root system. The use of foliar feeding of corn crops in field conditions with different level of resource supply and moisture fixed the best development of plants, which resulted in gain of grain yield in the range from 4.2 to 11.7 and even 16.9 c/ha, respectively, and net profit 33,2; 133,3 and 218,5 US dollars.