PHYSICAL AND CHEMICAL CHARACTERISTICS OF SOIL IN THE SENTAJO PROTECTED FOREST, KUANTAN SINGINGI DISTRICT, RIAU PROVINCE. Universitas Riau [Internet]. 2021 Apr. 23 [cited 2025 Aug. 2];5(1):1-6. Available from: https://jiik.ejournal.unri.ac.id/index.php/JIIK/article/view/89