Comparative Assessment of the Levels of Some Metal Ions in Soil Rhizosphere of Onion and Onion Bulb (Allium cepa l) Cultivated in Danbam Local Government Area: North East Nigeria. Communication In Physical Sciences, [S. l.], v. 7, n. 1, 2021. Disponível em: https://journalcps.com/index.php/volumes/article/view/419. Acesso em: 10 aug. 2026.