M. K. and M. WAJID KHAN, “Impact of fly ash application in soil on root colonization by a VAM fungus and root nodulation by Rhizobium”, Indian Phytopath., vol. 52, no. 2, pp. 185–187, Jun. 2002, Accessed: Oct. 22, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IPPJ/article/view/19504