MEASURING SOIL FERTILITY LEVELS AND SOIL ACIDITY FOR THE SUITABILITY OF PALM OIL PLANTING IN WEST PASAMAN WITH THE APPLICATION OF THE FUZZY INFERENCE SYSTEM. jit [Internet]. 2023 Dec. 31 [cited 2026 Aug. 5];17(4):973-88. Available from: https://publikasi.lldikti10.id/index.php/jit/article/view/2917