A. KUMAR, A. K. SARKAR, R. P. SINGH, and V. N. SHARMA, “Yield and trace metal levels in rice (Oryza sativa) as influenced by flyash, fertilizer and farmyard manure application”, Indian J Agri Sci, vol. 68, no. 9, Feb. 2013, Accessed: Oct. 28, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/27678