Nofriyanto Pakolo, Sembiring, M. ., & Rauf, A. (1). Isolation And Test Potential Of Phosphate Solubilization Microorganisms On Andisols Sinabung Eruption Impact On Some Thickness Of Ash In Karo District. Jurnal Online PERTANIAN TROPIK, 5(3), 328- 339. https://doi.org/10.32734/jpt.v5i3.3058