Effect of adding NPK compound fertilizer and spraying with chelated iron on the growth and flowering of two cultivars of African marigold. Texa. Jour. of Agri. and Biol. Scie. [Internet]. 2022 Dec. 6 [cited 2025 Oct. 11];11:13-22. Available from: https://mail.zienjournals.com/index.php/tjabs/article/view/2911