Rogers, Peter M., Pius Z. Yanda, Noah M. Pauline, Simon Haikola, Anders Hansson, and Mathias Fridahl. “Effects of Biochar on Soil Fertility and Crop Yields: Experience from the Southern Highlands of Tanzania”. Tanzania Journal of Science 48, no. 2 (June 17, 2022): 256–267. Accessed February 7, 2023. https://tjs.udsm.ac.tz/index.php/tjs/article/view/1066.