KHURANA, M P S; DHILLON, N S; NAYYAR, V K. Critical level of sulphur deficiency and response of indian mustard (Brassica juncea) to sulphur application in alluvial soil. The Indian Journal of Agricultural Sciences, Delhi, India, v. 65, n. 7, 2012. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/18920. Acesso em: 4 jul. 2026.