Elucidation of the Impact of Lead Chloride on Growth Characteristics and Chlorophyll Content in Two Varieties of Sunflower (Helianthus annuus L.): Effect of Lead Chloride on Sunflower. Pakistan Journal of Scientific & Industrial Research. 2026;69(1):1-8. doi:10.52763/PJSIR.BIOL.SCI.69.1.2026.1.8