RAJKUMARA S, PALLED YB, BASAVARAJA N, KHOT AB. Weed-free period requirement of drill-sown onion (Allium cepa) – chilli (Capsicum annuum) – cotton (Gossypium herbaceum) relay intercropping system in rainfed Vertisols. Indian J Agri Sci. 2010;80(7). Accessed October 26, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/283