“Tropical Soil Labile Fractions of Copper in the Experimental Plots ±Ten Years After Application of Copper-Containing-Waste”. JOURNAL OF TROPICAL SOILS 23, no. 1 (March 28, 2018): 11–18. Accessed January 3, 2026. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/40.