HARUNA, Lawan; SAFANA, Aliyu Aminu; MUSA, Ibrahim Murtala; HAFEEZ, Hafeez Y.; DANKAWU, Umar M.; MACHINA, Muhammad M. Effect of Temperature and Retention Time on the Quality of Biochar of Some Agricultural Waste. Nigerian Journal of Physics, [S. l.], v. 35, n. 4, p. 1–7, 2026. DOI: 10.62292/njp.v35i4.2026.600. Disponível em: https://njp.nipngr.org/index.php/njp/article/view/600. Acesso em: 14 jul. 2026.