Sarkar, S., Santra, G. H., & Mandal, M. (2015). Effect of Green Manure and Bio-fertilizers on the Availability of Zinc and Copper and their Uptake by Rice (Oryza sativa L.). International Journal of Bio-Resource and Stress Management, 6(Aug, 4), 534–538. Retrieved from https://ojs.pphouse.org/index.php/IJBSM/article/view/748