Pujiwati, H., Susilo, E., Prameswari, W., Fitri, M. A., Sari, S. R., Widodo, W. and Arraudah, R. 2026. Comparative study of different cultivation systems of black soybean on ultisol land. International Journal of Agricultural Technology. 22, 4 (Jul. 2026), 1859–1870. DOI:https://doi.org/10.63369/ijat.2026.22.4.1859-1870.