PATEL, Neelam; RAJPUT, T.B.S. Effect of fertigation frequency on onion (Allium cepa) yield and soil nitrate-nitrogen. The Indian Journal of Agricultural Sciences, Delhi, India, v. 75, n. 11, 2005. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/9271. Acesso em: 27 oct. 2025.