Yonathan, Y., Lumbanraja, J., Buchari, H., & Afrianti, N. A. (2025). THE EFFECT OF LONG-TERM SOIL TREATMENT AND N FERTILIZATION ON ORGANIC CARBON CONTENT, SOIL NITROGEN AND N ABSORPTION AND PRODUCTION IN CORN CROPING IN ULTISOL SOIL, YEAR 3. Jurnal Agrotek Tropika, 13(3). https://doi.org/10.23960/jat.v13i3.11390