Purnomo, E., Hashidoko, Y., Hasegawa, T. and Osaki, M. 2018. Extreme High Yield of Tropical Rice Grown Without Fertilizer on Acid Sulfate Soil in South Kalimantan, Indonesia. JOURNAL OF TROPICAL SOILS. 15, 1 (Apr. 2018), 33–38. DOI:https://doi.org/10.5400/jts.2010.v15i1.33-38.