Yields of haricot beans depending on soil tillage, mineral fertilizers and row spacing under irrigation

Actuality. Nowadays there is a tendency to change agricultural producers attitude to leguminous crops. First of all it concerns winter pea, chickpea, lentil and haricot. At the moment sown areas under haricot are being expanded mainly at the expense of the private sector. The industrial cultivation is insignificant and does not extend, mainly, because of too little knowledge in haricot cultivation technology elements in different agro-climatic zones. Lately the works dedicated to different aspects of the haricot cultivation technology have been conducted by Saiko O.Yu., Horova T.K., Cherkasova V.K., Akulenko V.V., Bakhmat M.I., Omae H., Kumar A., Egawa E. Along with this, effect of tillage depth, fertilizers and inter-row spacing on the haricot productivity under conditions of the energy and financial crisis has not been completely studied for the irrigated conditions of the South Steppe Zone of Ukraine, that determined necessity of the proper studies in the above-mentioned field. Methods of the studies. The research on the improvement of the elements of the cultivation technology of haricot beans in the south of Ukraine was carried out using a three-factor field experiment on the territory of the agricultural cooperative «Radianska zemlia» in Bilozerskyi district of Kherson region. The field experiments were repeated four times. The location of the variants was carried out using a split plot method with partial randomization. In the field experiments, the following factors and their variants were examined: Factor A — basic soil tillage: tillage of 20-22 cm deep; tillage of 28-30 cm deep. Factor B – nutrition background: no fertilizer; N45P45; N90P90. Factor C – the width of row spacing, cm: 15; 30; 45; 60. The studies were carried out with accordance to the common methodology of the field experiments. Conclusions. The research conducted with haricot under irrigation with irrigation water of the second quality grade (the Ingulets irrigated area) during 2014-2016 showed that the highest productivity of the plants of 3,37 t/ha is formed when the tillage is 28-30 cm deep, the application of mineral fertilizers with the norm N90P90and the row width of 45 cm. Taking into account the conducted dispersion data analysis we maintain that the most suitable for the introduction into production will be the following elements of the agro-technological complex of cultivation of the crop, which will include tillage of 20-22 cm deep, the application of mineral fertilizers with the norm N45P45 and sowing with the spacing of 45 cm. These technological elements will provide haricot grain yield of at the level of 3.09 t/ha.