Effect of adding NPK compound fertilizer and spraying with chelated iron on the growth and flowering of two cultivars of African marigold. Texas Journal of Agriculture and Biological Sciences, [S. l.], v. 11, p. 13–22, 2022. Disponível em: https://mail.zienjournals.com/index.php/tjabs/article/view/2911. Acesso em: 11 oct. 2025.