1. Alberta Government, 2001. An Introduction to Wind Erosion Control. Department of Agriculture, Food and Rural Development, Edmonton, Alberta, Canada. Agdex 572-2, p. 8.
2. Effect of four continuous tillage systems on mechanical impedance of a clay loam soil;Bauder;Soil Sci. Soc. Am. J.,1981
3. Bulk density;Blake,1986
4. Changes in soil properties under no-tillage;Blevins,1984
5. Changes in soil properties after 10 years non tilled and conventionally tilled corn;Blevins;Soil Tillage Res.,1983