Ahadiyat, Yugi R, Sapto Nugroho Hadi, and Okti Herliana. 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). Malang, Indonesia:1245-50. https://doi.org/10.15243/jdmlm.2018.053.1245.