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Effect of Different Types of Surfectants on Zinc Efficiency in Spinach Yield. International Journal of Sustainable Agricultural Research, [S. l.], v. 1, n. 2, p. 45–51, 2014. Disponível em: https://archive.conscientiabeam.com/index.php/70/article/view/211. Acesso em: 2 nov. 2026.