KasnoA., RachimA., IskandarI., & AdiningsihJ. S. (2004). Relationship between K/Ca Ratios in the Soil Solution with the Dynamic of K in Ultisol and Vertisol of Upland Area. Jurnal Ilmu Tanah Dan Lingkungan, 6(1), 7-13. https://doi.org/10.29244/jitl.6.1.7-13