The effect of drip irrigation on the yield of soybean varieties in the plains of Dagesta

In the teaching and experimental farm of Dagestan Agricultural University n.a. M.M. Dzhambulatov in the two-factor field experiment were studied three soybean varieties of VNIIMK’s breeding while maintaining 4 variants of irrigation regime: 60, 70, 80 and 90 % of field moisture capacity by means of drip irrigation. The results of studies showed that the most promising variety is the mid-season soybean variety Vilana the yield of which was 3.75 t/ha, while maintaining the preirrigation level of soil moisture at 80 % of field moisture capacity that requires 13-23 irrigations by rate of 150 m 3/ha depending on the weather conditions of the growing season. This type of irrigation also provides the lowest water consumption of all three soybean varieties.