MOORTHY, B T; DAS, T K. Threshold level of weed umbrella sedge (Cyperus iria) in upland rice (Oryza sativa) under rainfed direct-seeded condition. The Indian Journal of Agricultural Sciences, Delhi, India, v. 68, n. 1, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/27173. Acesso em: 20 oct. 2025.