Change of Soil Biomass Carbon Microorganism in Ultisols Soil Due to Application of Humic Acid and TSP Fertilization. j Trop. Soils [Internet]. 2021 Sep. 25 [cited 2025 Nov. 1];26(3):149-56. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/445