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The growth of gross grain may be obtained only with growth of agrotechnical methods. Therefore there is a need for further investigation of the complex influence of the main technical means on plant growth and development. It is necessary to define an influence of multicomponent drugs on the wheat win- ter resistance and productivity. To solve this task, field investigations were held for conditions of northern Steppe aiming to define regularities of growth and development, winter resistance forming, and productivity of the hard winter wheat depending on growth regulating drugs, different levels of mineral nutrition, and different predecessors. The investigation (2013–2017) was held on the training field “Samarskiy” of Dneprovskiy National Agrarian-economical University (Dnipropetrovsk oblast) on common chernozem soil with low contains of humus medium loam. The square of the field 30 sq. m., three times frequency, allocation is systematic. In general, the weather conditions for years of the investigation were specific for the Steppe zone. It was defined that depending on the presence of the main factors of life sustenance, the influence of studied drugs (which contain different organic and non-organic elements) varies a lot but there are some regularities. At the worst conditions (after a stubble predecessor and with low level of nutrition) the drugs have shown minimal influence on wintering of the hard winter wheat. So, the maximum increase of nutrition the drugs can give (drugs “Mars ELBi” and “AKM”) only at 2.6 % higher than at the control, which is not so significant. Minor increase or even decrease of wintering caused by usage of the studied drugs was noticed also at the best background (fallow land, N30Р60K40). The best cryoprotection was obtained with the drug “Vympel”, which increased the plant survival at 8.6 % comparing with the control. The same regularities of the influence of complex drugs depending on the background are found at the productivity forming as well. At follow land in conditions of sufficient nutrition the effect of the most studied drugs hasn’t increased or was insignificant. Chlormequat-chloride 750, as opposed to multicomponent drugs, has shown consistent and positive effect in conditions of high background. Among studied drugs the best sustainability in increasing grain productivity of the hard winter wheat has shown drug “Mars ELBi” used in spring after the vegetation renewal (daily-average temperature +10 оС) with norm 750 ml per ha. Key words: hard winter wheat, growth regulator, winter resistance, productivity, grain quality, cost efficiency.

Today, in the scientific and practical field, as well as a long time later, much attention is paid to improving the quality and quantity of yield. To obtain the desired results, we considered various systems of basic soil tillage in the growing of winter wheat, namely, determined the influence of basic soil tillage systems on the autumn development of winter wheat in the Luhansk region. The results of research of the influence of the basic soil tillage and the forecrop on the density and content of productive moisture in the soil layer of ordinary chernozems and on the autumn phases of development of winter wheat variety “Antara” are discussed. The research was performed in 2018‒2020 in the fields of the department of scientific and technical training in agronomy and farms located in the north-central moderately arid subzone of Luhansk region. Three methods of soil tillage have been studied by us: moldboard ploughing ‒ depth 22 cm; moldboard- less disking ploughing ‒ depth 10 cm; moldboard-free subsurface cultivation ‒ depth 12 cm. Forecrops: occupied fallow, sunflower, maize. The research was performed according to generally accepted methods. By means of research was established the advantage of moldboard ploughing over moldboardless ploughing. Moldboard soil ploughing contributed to the creation of lower density in the arable horizon under different forecrops, greater microbiological activity of the soil, better water supply during the autumn vegetative season. Moldboard ploughing increased access to nutrients such as potassium and nitrogen, and moldboardless ploughing accumulated available phosphorus. Improving the agrophysical properties of the soil contributed to the formation of better biometric indices in the autumn vegetative season. The height of the plants where the soil was plowed to the depth 22 cm was higher compared to the height of the plants with moldboard- less disking ploughing to the depth 10 cm. This affected the number of stems, which also increased, the number of leaves and roots increased, respectively. The depth of the tillering node increased relative to the increase in the depth of soil tillage, the weight of 100 absolutely dry plants increased, respectively, almost three to four times. Thus, the basic soil tillage improves the agrophysical properties, increases the microbiological activity of the soil and improves the biometric indices of plants.