Quality of Soil and Yield of Food Crops in Ultisols Due to Application of Manure and Source of Phosphate Fertilizer. j Trop. Soils [Internet]. 2019 May 28 [cited 2026 Jan. 11];17(1):45-52. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/318