REDDY, B G MASTHANA; PATTAR, P S. Leaf colour chart-a simple and inexpensive tool for nitrogen management in transplanted rice (Oryza sativa). The Indian Journal of Agricultural Sciences, Delhi, India, v. 76, n. 5, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/2871. Acesso em: 27 oct. 2025.