SINGH VK, KUMAR V. Delineation of sulphur deficiencies in Trans-Gangetic Plain and on-farm sulphur management for higher productivity and profits in rice (Oryza sativa)-wheat (Triticum aestivum) system. Indian J Agri Sci. 2013;83(12). Accessed October 26, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/35956