[1]
Edem, I.D., Udoinyang, U.C. and Udounang, P.I. 2015. Tractor Effects on Soil Properties and the Consequences on Cassava (Manihot esculenta Crantz) Yield in Ultisol. International Journal of Environment. 4, 1 (Feb. 2015), 210–223. DOI:https://doi.org/10.3126/ije.v4i1.12190.