اﺛﺮ ﺗﻨﺶ ﮐﻤﺒﻮد آب ﺑﺮ ﻋﻤﻠﮑﺮد و ﺑﺮﺧﯽ اﺟﺰای ﻋﻤﻠﮑﺮد ارﻗﺎم آﻓﺘﺎﺑﮕﺮدان

Effect of drought stress on yield and yield components of sunflower cultivars