Object of study – is the process of transformation and formation of production processes of corn, the dynamics of water consumption, the level of productivity depending on irrigation regimes, methods and depth of tillage on irrigated lands in southern Ukraine. Purpose – is to establish the patterns of influence of differentiation of irrigation regimes during the growing season, different methods and depth of basic tillage on physical and mechanical, water, nutritional properties, phytosanitary condition of crops, corn productivity indicators and determine the impact of factors on economic and energy indicators. Methods – general scientific (analysis, synthesis, observation, comparison, measurement, etc.), special (field, laboratory-field, laboratory, certified generally accepted scientific methods), mathematical-statistical and computational-comparative. Results – it was found that when growing corn for grain plowing to a depth of 28-30 cm has a positive effect on the density, porosity and permeability of the soil. Observations of the components of total water consumption have shown that the use of plowing at 28-30 cm allows more efficient storage and use of soil moisture accumulated during the autumn-winter period. Shelf deep plowing of 28-30 cm promotes better accumulation, decomposition of organic matter in the soil, assimilation of nutrients by the soil, which in turn had a positive effect on the content of mobile forms of nitrogen, phosphorus and potassium in the soil and allowed to have the lowest levels of soil contamination. Plowing at 28-30 cm, together with the generally accepted irrigation regime according to the scheme of 70-70-70% LMC has a positive effect on the productivity of corn, the interaction of these options contributes to the formation of the highest yields on average over the years, at 13.79 t / ha. The use of plowing to a depth of 28-30 cm and the generally accepted irrigation regime under the scheme of 70-70-70% LMC contributed to the formation of the largest volumes of gross output, the lowest cost, the largest net profit with the highest level of profitability 105.6%. The highest level of energy input with harvest, its growth and the highest energy coefficient (2.20) was marked by the option of plowing to a depth of 28-30 cm together with the use of the generally accepted irrigation regime. Novelty – for the first time for the conditions of the Southern Steppe the influence of irrigation regimes and methods and depth of tillage on agrophysical indicators of dark-chestnut weakly saline soil and production processes of corn yield formation was studied. The scientific value – improved elements of the technology of growing corn for grain in the southern region of Ukraine under irrigation conditions and identified their optimal parameters for sowing medium-ripe hybrid corn Kakhovskyі. Sector – agriculture.
