Harahap, F. S., Walida, H., Rauf, A., Arman, I., Sudarijah, S., & Harahap, S. (2026). Study of Soil Properties on Various Slopes in the Cultivation of 15-Year-Old People’s Rubber Plants in Janji Village, Bilah Hulu District, Labuhanbatu Regency. Proceeding of International Conference Technology, Economics, and Social Science, 1(1), 717-723. Retrieved from https://journals.adaresearch.or.id/ictess/article/view/229