Low-Cost Biochar: A Sustainable Approach to Improve Soil Fertility and Crop Yield for Small-Scale Farmers. American Journal of Environmental Economics, [S. l.], v. 4, n. 1, p. 67–72, 2025. DOI: 10.54536/ajee.v4i1.4613. Disponível em: https://e-pallipublishers.com/index.php/ajee/article/view/4613. Acesso em: 28 jul. 2026.