MOORTHY, B T, and T K DAS. “Threshold Level of Weed Umbrella Sedge (Cyperus Iria) in Upland Rice (Oryza Sativa) under Rainfed Direct-Seeded Condition”. The Indian Journal of Agricultural Sciences 68, no. 1 (February 8, 2013). Accessed October 20, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/27173.