JAGGI, R C; DIXIT, S P. Onion (Allium cepa) responses to sulphur in representative vegetable growing soils of Kangra Valley of Himachal Pradesh. The Indian Journal of Agricultural Sciences, Delhi, India, v. 69, n. 4, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/26684. Acesso em: 28 oct. 2025.