Effect of Biochar Feedstock Types on Physical and Chemical Properties of Humic Nitisols in Kakamega County, Kenya. Journal of Advances in Science, Engineering and Technology, [S. l.], v. 2, n. 1, p. 26 – 33, 2026. Disponível em: https://journals.mmust.ac.ke/index.php/aset/article/view/132. Acesso em: 19 mar. 2026.