Effect of foliar spray with potassium and calcium on the physiological response and relative value of stability of lettuce plant under drought stress conditions. مجلة للعلوم الزراعية [Internet]. 2025 Aug. 26 [cited 2026 Jun. 18];41(3). Available from: https://journal.damascusuniversity.edu.sy/index.php/agrj/article/view/8258