Qoraqalpog‘iston sharoitida soyaning «Hosildor» va «Uzbekskaya–2» navlarini yomg‘irlatib sug‘orishning suv tejamkor tartiblari

Abstract

This article evaluates sprinkler irrigation regimes for the “Hosildor” and “Uzbekskaya–2” soybean cultivars grown on long-irrigated meadow-alluvial soils in Chimbay district, Republic of Karakalpakstan. Pre-irrigation soil moisture levels of 65–70–70%, 70–75–75%, and 75–80–80% of the limited field moisture capacity were compared with furrow irrigation. Soil moisture, irrigation rates, water use, plant growth, and grain yield were assessed. The results indicate that sprinkler irrigation reduces water use compared with furrow irrigation. The strongest water-saving performance was observed under the 75–80–80% regime, particularly for the “Uzbekskaya–2” cultivar. These findings are practically relevant to improving water-use efficiency and soybean cultivation practices in the region.