Mitigating Heavy Metal Toxicity In Maize Under Contaminated Soil Using Spent Mushroom Substrate Biochar And Growth-Promoting Rhizobia. AMAR [Internet]. 2026 Apr. 30 [cited 2026 Sep. 28];4(4):552-65. Available from: https://amresearchjournal.com/index.php/Journal/article/view/2219