References

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Gill, W.R. and G.E.V. van den Berg, 1968. Soil Dynamics in Tillage and Traction. Department of Agriculture, Washington, USA., pp: 511.

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Kushwaha, R.L. and C. Linke, 1996. Draught-speed relationship of simple tillage tools at high operating speeds. Soil Tillage Res., 39: 61-73.
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Kydd, H.D., G.E. Frehlich and A.R. Boyden, 1984. Tillage power requirements in western Canada ASAE. Paper No. 84-1027 St Joseph; Michigan; ASAE.

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Manuwa, S.I., 2002. Development of an equipment for soil tillage dynamics and evaluation of tillage parameters. Ph.D. Thesis, Federal University of Technical, Akure, Ondo State, Nigeria, pp: 346.

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