Raid Sh. Jarallah, Angham Farhan Mutlaq AL-Manasir. 2021. “Effect of Dap Fertilizer Type and Growth Periods in Ammonium Concenteration in Rhizosphere of Rice Plant”. Annals of the Romanian Society for Cell Biology, April, 12104-14. https://annalsofrscb.ro/index.php/journal/article/view/4070.