1. Effect of tillage on some soil properties, plant development and yield of spring wheat (Triticum aestivum L.) in stony soil;Agenbag;Soil Till. Res.,1991
2. Conservation tillage: an ecological approach to soil management;Blevins;Adv. Agron.,1993
3. Campbell, G.S., Mulla, D.J., 1990. Measurement of soil water content and potential. In: Stewart, B.A., Nielsen, D.R. (Eds.), Irrigation of Agricultural Crops. ASA-CSSA-SSSA, Madison, pp. 127–141.
4. Trends in tillage practices in relation to sustainable crop production with special reference to temperate climates;Cannell;Soil Till. Res.,1994
5. Godwin, R.J., 1990. Agricultural engineering in development: tillage for crop production in areas of low rainfall. FAO, Rome, 124 pp.