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Arenga pinnata solid waste can be used as biochar-making material because it contains biomass agriculture and forestry residue. This research purposed to know the effect of pyrolysis in yield and characteristic of biochar as soil amendment. The research done by making model and practice the model. The variables of this research were : temperature, biochar yield, C-organic content, water content, pH, N, P, and K. The raw materials weight that used in each pyrolysis process is 200 grams.Thedoi:10.31315/e.v11i1.321 fatcat:2jxgrpl75bgvxdj2kmei4euufy