I.D, E.; O.Edem, S.; J Ijah, C. Relationship of Landscape Positions With Soil Properties on Maize Yield in Ultisol. Am. J. Agric. Sci. Eng. Technol. 2018, 2 (1), 21-40. https://doi.org/10.54536/ajaset.v2i1.29.