MISHRA, A K; SINGH, A K; SINHA, B K; PANDEYA, S B. Distribution of nitrate-nitrogen in ground water and in some soils of Bihar. The Indian Journal of Agricultural Sciences, Delhi, India, v. 70, n. 5, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/28253. Acesso em: 28 oct. 2025.