The article presents the results of studies on the reaction of domestic varieties of white annual melilot to elements of agricultural technology in nonirrigated conditions of the South of Ukraine. The goal was to investigate the process of water consumption and the formation of seed yields of various cultivars by optimizing the row spacing and doses of nitrogen fertilizer. Studies were conducted during 2016-2018 based on IZZ NAAN, according to generally recognized methods of conducting field experience, methodological recommendations and manuals. The following methods were used: general scientific, special, comparative-analytical, regression, information-logical analysis and mathematical modeling. The maximum average annual total consumption of white sweet clover – 2528 m3 /ha was established using the Donetsk annual variety using a row spacing of 60 cm and a dose of nitrogen fertilizer N90. The smallest coefficient of water consumption - 4525 m3 /t was installed on Yuzhny variety with a row spacing of 45 cm and a dose of nitrogen fertilizer N60. On average, the highest seed productivity of the crop – 556 kg/ha was established on the variant using the Yuzhny variety using a row spacing of 45 cm and a dose of nitrogen fertilizer N60
annual white melilot, variety, row spacing, dose of nitrogen fertilizer, total water consumption, water consumption coefficient, productivity
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