Harahap FS, Walida H, Rauf A, Arman I, Sudarijah S, Harahap S. 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. ictess [Internet]. 2026Jan.25 [cited 2026Aug.22];1(1):717-23. Available from: https://journals.adaresearch.or.id/ictess/article/view/229