Goal. To determine the features of economic and energy efficiency and productivity of potato plants of variety Kobza depending on the elements of the technological process of growing under drip irrigation in the South of Ukraine. Methods. The research was performed during 2013-2015 in the area of the Inhulets irrigation system by generally accepted methods. Field, laboratory, mathematical-statistical, computational, and comparative methods were used, abstract and system analysis was performed. Results. The maximum yield was obtained when using local application of mineral fertilizers at a dose of N60P60K60 on the background of soil moisture 0.6 m by 35.81 t/ha with the number of tubers under the bush 6.3 pcs. The average cost of the material obtained in the experiment-1,522 thousand UAH/t. Increasing the depth of the calculation layer and applying fertilizers in various ways helped to reduce costs. The exception was the use of N60P60K60 with irrigation water, which led to a slight increase in cost. On average, according to the experiment, the energy yield was 103.9 GJ/ha, in the control, it was accumulated from 79.2 to 82.9 GJ/ha. Conclusions. The lowest cost (1,345 thousand UAH/t of product), the maximum net profit (77,160 thousand UAH/ ha), and the increase in energy (66.30 GJ/ha) were obtained under conditions of moistening of 0.6 m of the soil layer and local application of N60P60K60. The level of profitability was 160%, the energy efficiency ratio was 2.24.

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