V. K. SINGH and V. KUMAR, “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, vol. 83, no. 12, Dec. 2013, Accessed: Oct. 26, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/35956