The research was conducted within the territories of rural settlements of Zhytomyr region. A total of 72 sources of non-centralized water supply were surveyed. Water quality was assessed by physical and chemical (pH, iron total, total water hardness) and toxicological (nitrites, nitrates, and ammonium) indicators, the content of which was compared with the norms given in the State Sanitary Regulations and Standards 2.2.4-171-10 “Hygienic Requirements for Drinking Water Intended for Human Consumption.” The assessment of drinking water quality was carried out in accordance with DSTU (National Standards of Ukraine) 4808:2007 and with the water quality index (WQI). It was found that the largest deviations from the norm among toxicological indicators were observed for nitrates – 63.9%. In terms of water quality classes according to DSTU 4808:2007, drinking water from sources of non-centralized water supply of villages showed the following distribution: 2.8% of the samples belonged to class 1 (excellent water quality), 72.2% to class 2, and 25% to class 3. According to WQI, 16.7% of the examined sources of non-centralized water supply had excellent water, 63.9% had good water, and 19.4% had poor water. Despite the fact that the water from the investigated sources of non-centralized water supply was of acceptable quality, it is impotable due to the excessive nitrate content. The results obtained show that there is a need for monitoring of drinking water quality from the sources of non-centralized water supply, especially in rural settlements that are not provided with centralized water supply.

Competition in the hotel industry makes it necessary to study innovative ways to preserve and increase customer base. Effective interaction with customers is evidence of hotels’ innovative activity determined by the active implementation of marketing concepts and the development of information technologies. Therefore, customer engagement involves digitalizing the “hotel-consumer” interaction process. This study aims to determine the components of digital customer engagement in the hotel industry using systematization, generalization, survey, and econometric models. The components of digital customer engagement include recognition, interest, communications, consumer experience, loyalty, and intentions of repatronage. Econometric models used the data of hotels in Kyiv (Ukraine) to prove the dependence of their income on the costs of digital consumer engagement. For financial indicators, the study surveyed hotel managers and stakeholders. The selected indicators have a significant influence on hotel income. In the case of a linear model (“Khreshchatyk” hotel), the parameters show how many units the effective feature will change when one-factor characteristic changes by one unit (assuming other factors are constant). In the case of power-law models (“Bratislava” and “Ukraine” hotels), the parameters are essentially elasticity coefficients that demonstrate the sensitivity of income changes to changes in factor characteristics. Accordingly, the coherence of implementation of all components in the digital engagement of hotel services’ consumers ensures an increase in service provision volume and hotel operations’ efficiency. AcknowledgmentThe paper shows the author’s results within the frameworks of the study, performed in 2021−2023 at Kyiv National University of Trade and Economics at the request of the Ministry of Education and Science of Ukraine, “Digital transformation of trade, economic and tourist systems in Ukraine” (state registration number 0121U112231) and “Forecasting the impact of the tourism system on the country’s economy” (state registration number 0122U001559).

The article examines the level of safety of investments in hotel real estate, and also develops general recommendations regarding its provision. It is noted that the safety of investments is an integral concept, and its achievement of optimal indicators forms the investment attractiveness of the micro- and macroeconomic environment. It was found that the investment potential of hotel real estate has been decreasing since 2019 due to unavoidable factors, in particular, the coronavirus pandemic and large-scale military aggression on the territory of Ukraine, which caused significant risks of financial capital losses.A negative forecast regarding the level of investment attractiveness of the hotel sector was found, verified on the basis of the method of scanning horizon, which is aggravated by the uncertainty of the war timeframe and the impossibility of predicting the scale of the destruction of social and tourist infrastructure.Globalization and digitalization of all aspects of the economy make it possible to form priority directions for the formation of safe relations regarding the investment of hotel projects adapted to the new conditions of the national economy. The relevant factors determining the conditions of investment in hotel real estate were worked out by the method of scanning the horizon.Therefore, this study aims to assess the conditions and risks of an investment in hotel real estate and to develop potential innovative models of interaction between the investor and the recipient of the investment (a subject of the hotel business), which will increase the attractiveness of hotel real estate for investment. The relevance of the above provisions is confirmed by the prospects of restoration of the hotel business after the end of martial law in Ukraine.

A reliable element of the technology for growing environmentally friendly products of early-ripening soybean varieties, and improving soil fertility, is the introduction of environmentally friendly growing technology based on the optimal functioning of the symbiotic system, without using mineral fertilisers, in particular nitrogen and pesticides. The purpose of the research was to explore the effect of inoculation of seeds of diverse soybean varieties with nitrogen-fixing and phosphorus-mobilising preparations, foliar fertilisation and their combination on growth, plant development and productivity under organic cultivation technology. The research was conducted using generally accepted methods, the field method, and the method of statistical evaluation of results. Experimental studies have established that with the introduction of high-yielding soybean varieties, using post-harvest residues (straw, stubble and root residues), green manure and legumes in a short rotation crop rotation, 136 kg of nitrogen and 142 kg of biologically fixed nitrogen enters the soil. It was demonstrated that seed treatment with AgriBacter inoculant and soybean fertilisation with Nanovit Super complex fertiliser ensures a yield of 4.08 t/ha for Mentor and leaves almost 30% of biological nitrogen in the soil. Studies have demonstrated that an integrated approach to the treatment of soybean seeds of the tested varieties with AgriBacter and Phosphoenterin inoculants, a strain of bacteria that decomposes hardly soluble organic phosphates, which in turn contributes to better nutrition of soybean plants, development of the root system, and has a positive effect on the development of an optimal stem density of 410-490 thousand units/ha, which provides an increase in the yield of soybean varieties by 1.88 t/ha. It was established that simultaneous inoculation of seeds and foliar feeding of soybeans with the biologically active complex Nanoactiv with the addition of magnesium sulfate in the macrostage BBCH 60-63 provides the highest yield of Niagara variety – 4.08 t/ha and Astor variety – 2.88 t/ha. Thus, in a shortrotation 4-season crop rotation saturated with legumes, using nitrogenfixing, phosphorus-mobilising preparations and the active growth stimulator Nanovit Super + Magnesium sulfate, soil fertility increases and the nitrogen content in the soil doubles. The scientific results can become the foundation for improving soil fertility, which will ensure sustainable yields in organic soybean cultivation

The influence of complex treatment of spring wheat seeds (cultivar Rannye 93) with Agrobacterium radiobacter and some strains of phosphatemobilizing bacteria on growth and development of plants was investigated. Effective compositions of A. radiobacter and phosphatemobilizing bacteria strains were determined. The treatment of seeds with the above-mentioned compositions has increased quantity of shoots, including productive ones, height of plants and quantity of grains in main ears as well as productivity and yield on 22,5-43,5 %.