Tola, E. (2018) “Determining soil organic carbon concentration in agricultural fields using a handheld spectroradiometer: Implication for soil fertility measurement”, International Journal of Agricultural and Biological Engineering. Beijing, China, 11(6), pp. 13–19. Available at: https://ijabe.org/index.php/ijabe/article/view/4061 (Accessed: 31 March 2026).