SUREKHA, K; RAO, K V; SAM, T K. Improving productivity and nitrogen use efficiency through integrated nutrient management in irrigated rice (Oryza sativa). The Indian Journal of Agricultural Sciences, Delhi, India, v. 78, n. 2, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/2677. Acesso em: 27 oct. 2025.