1. Clothier, B.E. 2001. Infiltration. In K.A. Smith and C.E. Mullins eds., Soil and Environmental Analysis, Physical Methods. 2nded. Marcel Dekker Inc., New York. 239–280.
2. Derpsch, R. and Moriya, K. 1999. Implications of soil preparation as compared to no-tillage, on the sustainability of agricultural production: experiences from South America. In M.V. Reddy ed., Management of Tropical Agroecosystems and the Beneficial Soil Biota. Oxford & IBH, New Delhi. 49–65.
3. Egli, D.B. and Crafts-Brandner, S.J. 1996. Soybean. In E. Samski and A.A. Schaffer eds., Photoassimilate Distribution in Plants and Crops. Marcel Dekker, Inc., New York.
4. Phillips, R.E. 1984. Effects of climate on performance of no-tillage. In R.E. Phillips and S.H. Phillips eds., No Tillage Agriculture, Principles and Practices. Van Nostrand Reinhold Company Inc., New York. 152–170.
5. Thomas, G.W. and Frye, W.W. 1984. Fertilization and liming. In R.E. Phillips and S.H. Phillips eds., No Tillage Agriculture, Principles and Practices. Van Nostrand Reinhold Company Inc., New York. 87–126.