SUMARNO; YENNI ASBUR; MURNI SARI RAHAYU. CHANGES IN RAINFALL ON PLANTING AREA AND OIL PALM PRODUCTION IN THE HIGHLANDS OF DELI SERDANG DISTRICT, NORTH SUMATRA. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), [S. l.], v. 4, n. 10, 2025. DOI: 10.54443/ijset.v5i1.1313. Disponível em: https://ijset.org/index.php/ijset/article/view/71-75. Acesso em: 9 jun. 2026.