Determination of irrigation standards for winter wheat through monitoring of groundwater levels

Abstract This article presents field experiments widely used in the irrigation of winter wheat, monitoring the groundwater level. Data indicate that groundwater use in the Republic of Uzbekistan increases by 23-25 km³ per year. There is also the possibility for widespread use of groundwater to irrigate land plots with close groundwater levels and mineralization between 1 and 3 g/L in the Syrdarya region. During the study, an experimental field was divided into 16 small areas and processed four times on each one. Groundwater was artificially raised to depths of 1.0 and 2.0 meters, blocking closed horizontal drainage. According to the results, during the non-growing season, closed horizontal drainage blocked at a height of 0.1 m, groundwater levels were 27.2-29.8 cm. In the version with overlap at 2 meters - 28.9-31.1 cm, and in the control - 31.4-32.5 cm. During the growing season, when the closed horizontal drainage is blocked at a height of up to 1.0 cm, the groundwater level is 286-288 cm. In the variant where groundwater is blocked to a height of 2.0 m, the ground water level is 270-304 cm, allowing the use of ground water to increase the capillary moisture content of soil when watering winter wheat during low water years.