ARYA, K C; SINGH, S N. Productivity of maize (Zea mays) as influenced by different levels of phosphorus, zinc and irrigation. The Indian Journal of Agricultural Sciences, Delhi, India, v. 71, n. 1, 2014. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/39507. Acesso em: 21 oct. 2025.