Hatta, M. 2020. A Site-Specific Fertilizer Recommendation Based on the Phosphorus and Potassium Status in Mempawah District, West Kalimantan. JOURNAL OF TROPICAL SOILS. 25, 2 (May 2020), 93–106. DOI:https://doi.org/10.5400/jts.2020.v25i2.93-106.