S. Suntoro, G. Herdiansyah, and M. Mujiyo, “Nutrient status and soil fertility index as a basis for sustainable rice field management in Madiun Regency, Indonesia”, Sains Tanah J. Soil Sci. Agroclimatology, vol. 21, no. 1, pp. 22–31, Jun. 2024, doi: 10.20961/stjssa.v21i1.73845.