Anggita, T., Z. Muktamar, and F. Fahrurrozi. “Improvement of Selected Soil Chemical Properties and Potassium Uptake by Mung Beans After Application of Liquid Organic Fertilizer in Ultisol”. TERRA : Journal of Land Restoration, vol. 1, no. 1, May 2018, pp. 1-7, doi:10.31186/terra.1.1.1-7.