Situmeang, Y.P. et al. 2018. Effectiveness of Bamboo Biochar Combined with Compost and NPK Fertilizer to Improved Soil Quality and Corn Yield. International Journal on Advanced Science, Engineering and Information Technology. 8, 5 (Oct. 2018), 2241–2248. DOI:https://doi.org/10.18517/ijaseit.8.5.2179.