TOLA, ElKamil; AL-GAADI, Khalid A.; MADUGUNDU, Rangaswamy; KAYAD, Ahmed G.; ALAMEEN, Ahmed A.; EDREES, Haroon F.; EDRRIS, Mohamed K. Determining soil organic carbon concentration in agricultural fields using a handheld spectroradiometer: Implication for soil fertility measurement. International Journal of Agricultural and Biological Engineering, [S. l.], v. 11, n. 6, p. 13–19, 2018. DOI: 10.25165/ijabe.v11i6.4061. Disponível em: https://ijabe.org/index.php/ijabe/article/view/4061. Acesso em: 27 jan. 2026.