Kapustin A. Effective methods of varietal technology of corn hybrids of different maturity groups in the eastern part of the Northern Steppe

The object of research is special features of corn growth and development, grain quality and yield formation depending agricultural practices. The aim – to optimize basic techniques of sorting agrotechnic of new corn hybrids of different groups of ripeness and to recommend for producing. Methods – field (conducting of phonological observations, defining of morphological, yielding and structural indicators); thermostatic and weighing (defining of moisture stock in soil); lab (defining of hydrolyzed nitrogen, mobile forms of phosphorus and potassium in the soil, chemical content of plants and grain of corn hybrids), mathematical (defining of data accuracy by analysis of variance). Results – the optimal terms of sowing, thickness of planting and mineral nutrition level of new corn hybrids, the usage of which provides a yield at 5-7 ton/ha. The results of research were tested in a production environment and implemented in 2010 in UNPAK LNAU “Kolos” Lutuginskiy region on the area of 7 hectares; in husbandries of Sverdlovskiy region on 800 hectares in 2011-2012 and other husbandries of Luhanskiy region on 3600 hectares. Contingent net profit is 309-507 UAH/ha. Novelty – for the first time under the condition of Northern Steppe the optimal terms of sowing and plants thickness were established. The influence level of mineral nutrition on growth, plant developing and forming of corn productivity. The is new scientific value of experimental data of influence of agricultural practices on plant water consumption, the structure of harvest, yield, moisture and grain quality. Sphere – agriculture.