Ekemube, R. A., A. T. Atta, and V. I. Ndirika. “Optimization of Fuel Consumption for Tractor-Tilled Land Area During Harrowing Operation Using Full Factorial Experimental Design”. COVENANT JOURNAL OF ENGINEERING TECHNOLOGY, July 2023, https://journals.covenantuniversity.edu.ng/index.php/cjet/article/view/3335.