Optimizing sunflower (Helianthus annuus L.) hybrids growth, achene and oil yield through soil applied sulphur and zinc by Saddam Hussain, Azizullah Khalili, Abdul Qayyum, Sami Ullah Khan, Ayaz Mehmood, Gulzar Ahmad, Abdel‑Halim Ghazy, Abdullah A. Al-Doss, Kotb A. Attia, Yawen Zeng

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