@Article{, title={Different irrigation periods and K fertilizer effects on water use efficiency of rice Oryza sativa L . mishkhab 1 cultivar.}, author={Hamza N.A. Al-Delamee and Ali A. M. Al-Akkam and Mariam A. Karbool}, journal={Euphrates Journal of Agricultural Science مجلة الفرات للعلوم الزراعية}, volume={12}, number={1}, pages={122-127}, year={2020}, abstract={A field experiment was carried out at the Rice Research Station at Al-Mishkhab - Najaf province - Iraq country during 2019 season to investigate effect of irrigation periods and K fertilizer on Water-Use Efficiency (WUE) of rice mishkhab1 cultivar using Randomized Completely Block Design (RCBD) in a factorial arrangement with three replicates , Irrigation periods were the first factor namely, continuous flooding Irrigation (I1) as control , every 5 days Irrigation (I2) ,every 7 days Irrigation (I3) and every 10 days Irrigation (I4) and the second factor was K fertilizer levels namely, 30 Kg Donum-1(K1) as control 40 Kg K D-1, (K2) , 50 Kg D-1 (K3) and 60 Kg D-1 (K4) , means were compered using Least Significant Difference test (L.S.D) among treatments at 0.05 probability level and the results shows the following: The (I2) treatment was significant superior on traits of (WUE) by 270 %, 17.1 % biological yield ,32.6% grain yield and for (WUE) by 86% as comparison with control (I1)

} }