P. Kitundu, Magreth, Neema Msuya, and Zainab Katima. 2025. “Production of Potassium-Rich Biofertilizer from Composted Banana Peels and Watermelon Rinds ”. Tanzania Journal of Engineering and Technology 44 (1):118 -36. https://doi.org/10.52339/tjet.v44i1.1128.