Otieno, P. C., S. Nyalala, and J. Wolukau. “Optimization of Biosolids As a Substrate for Tomato Transplant Production: Biosolids As an Alternative Substrate in Tomato”. Advances in Horticultural Science, vol. 34, no. 3, July 2020, pp. 313-2, doi:10.13128/ahsc-8118.