“Penentuan Kebutuhan Pupuk Kalium Dengan Uji K-Tanah Untuk Tanaman Jagung Di Typic Kandiudox”. JOURNAL OF TROPICAL SOILS 13, no. 3 (April 16, 2018): 179–187. Accessed February 17, 2026. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/75.