2024. EFFECT OF LEAVES DEFOLIATION AND DATE OFDEFOLIATION ON GROWTH OF SUNFLOWER PLANT(Helianthus annuus L.) IN GYPSYFEROUS SOIL. Iraqi Journal of Science. 50, 4 (Nov. 2024), 445–454. DOI:https://doi.org/10.24996/ijs.2009.50.4.%g.