MICRO-NUTRIENT FORMULATIONS FOR AGRICULTURE Part-H. Copper, Zinc, Manganese and Chromium Preparation. Biological Sciences - PJSIR, [S. l.], v. 37, n. 8, p. 326–329, 2022. Disponível em: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2703. Acesso em: 11 mar. 2026.