Today's market conditions require producers to minimise the cost of technological processes for growing crops to maximise profits. One of the important conditions for the selection and application of certain agrotechnical measures in potato growing technology is to obtain high yields, maximum net profit and a high level of profitability. Among the technological methods for growing table potatoes, the use of fertilisers is one of the most expensive items. Therefore, the use of liquid phosphate fertilisers and balancing fertilisation systems with meso-elements is one of the most promising measures in this regard. The purpose of the research was to determine the economic efficiency of systems of balanced nutrient supply of table potatoes with macro- and meso-elements on dark grey podzolic soil in the conditions of the Left-Bank Forest-Steppe of Ukraine using liquid phosphorus fertilisers. The research was conducted in the field experiment of the O.I. Dushechkin Department of Agrochemistry and Quality of Crop Production of the National University of Life Sciences of Ukraine at Biotech LTD (Boryspil district, Kyiv oblast) during 2015-2017. The area of the registered plot was 40 m2, and the repetition rate of the experiment is 3 times. The placement of variants is systematic. The research showed that the use of liquid phosphorous fertilizers in the rate of P105 on the background of N120K180 showed high economic efficiency in the cultivation of table potatoes and allowed to obtain a conditional net profit of 54.4 thousand UAH/ha and a profitability level of 59%. The introduction of the starter fertiliser Ca21Mg15B1.5 into the scheme provoked a rise in economic indicators relative to the control, but a decrease compared to similar variants without these elements. The reason for this is the introduction of phosphorus and calcium into one layer of dark grey podzolic soil, which provoked their interaction and the formation of tri-substituted phosphates, which, in turn, led to a decrease in yield. The multi-depth application of nutrients in the technologies of growing table potatoes is a promising area for further study
fertilisers, LCF 11-37, calcium, magnesium, boron, operating profit, profitability, fertiliser costs, yield, start fertiliser, profit