Lestari, A.M. et al. 2022. Diffusion and Adoption of Biochar Innovations in Agriculture at Gunungsari Village , Bumiaji Subdistrict, Batu City, East Java, Indonesia. RA Journal Of Applied Research. 8, 4 (Apr. 2022), 303–313. DOI:https://doi.org/10.47191/rajar/v8i4.14.