Ahadiyat, Y.R., Hadi, S.N. and Herliana, O. 2018. Application of wood vinegar coconut shell and NPK fertilizer to maintain sustainable agriculture of upland rice production. Journal of Degraded and Mining Lands Management. 5, 3 (Apr. 2018), 1245–1250. DOI:https://doi.org/10.15243/jdmlm.2018.053.1245.