Oyebode, O., and K. Shoji. “Development of a Simple, Movable, Indoor Soil Bin Equipped With Some Novel Measuring and Soil Preparation Devices”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 16, no. 4, Dec. 2020, pp. 751-62, https://azojete.com.ng/index.php/azojete/article/view/377.