Haruna L, Safana AA, Musa IM, Hafeez HY, Dankawu UM, Machina MM. Effect of Temperature and Retention Time on the Quality of Biochar of Some Agricultural Waste. NJP [Internet]. 2026 Jul. 2 [cited 2026 Jul. 14];35(4):1-7. Available from: https://njp.nipngr.org/index.php/njp/article/view/600