Otieno, Peter Caleb, S. Nyalala, and J. Wolukau. 2020. “Optimization of Biosolids As a Substrate for Tomato Transplant Production: Biosolids As an Alternative Substrate in Tomato”. Advances in Horticultural Science 34 (3):313-23. https://doi.org/10.13128/ahsc-8118.