Dubovyj O. Varietal reaction of winter wheat growing technological methods in the eastern part of the northern Steppe of Ukraine

Object of research – variety reaction of winter wheat on the process of performance during its cultivation on malohumusny ordinary chornozem, optimization and agrobiologycal basis of the productive potential of varieties in conditions of the Eastern Steppe of Ukraine. Goal – to develop and recommend to the agricultural production of more sophisticated Agrotechnical measures to increase grain yield of winter wheat varieties on the bare fallow in accordingly to climate change in the – and climatic conditions of the Eastern Steppe. Methods – Research (dialectics, experiment, analysis and synthesis, method of hypotheses, modeling), special (field, laboratory, comparison, current and mathematically-statistical). Results: A more effective methods and measures of Agrotechnical growing technology of winter wheat on the bare fallow, which provide obtaining 4,7-5,0 t per ha of grain quality for different meteorological conditions that 0,54-0,6 t per ha more compared with the harvest for planting at the recommended period in the area. This will increase net profit and the profitability of 243-266 UAH per ha and 16,8-18,3%, respectively, depending on variety. Novelty – first in the Eastern Steppes of Ukraine established patterns of density productive stems different varieties of winter wheat for the phases of its growth and development depending on the sowing time and sowing rate, and found evidence biological characteristics and response of winter wheat varieties to sowing time and sowing rate on a bare fallow in connection with climate change. Sector – Agriculture.