“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 2, no. 1 (March 12, 2026): 26 – 33. Accessed March 19, 2026. https://journals.mmust.ac.ke/index.php/aset/article/view/132.