The study looked at how different types of soil and speeds affect the performance of agricultural machinery in South-East Nigeria. The researchers found that the disc plough worked best in clay-loam soil at a speed of 6km/hr, while the harrow performed best in sandy-clay soil at 9km/hr. The ridger and rotovator also had their highest efficiencies in sandy-clay soil at 9km/hr. On the other hand, the planter worked most efficiently in sandy-clay soil at 5km/hr. Overall, sandy-clay soil had the highest average efficiencies for all the machinery, followed by clay-loam soil, and then loamy-sandy soil.