Rogers, Peter M., Pius Z. Yanda, Noah M. Pauline, Simon Haikola, Anders Hansson, and Mathias Fridahl. 2022. “Effects of Biochar on Soil Fertility and Crop Yields: Experience from the Southern Highlands of Tanzania”. Tanzania Journal of Science 48 (2):256-67. https://doi.org/10.4314/tjs.v48i2.3.