@INBOOK {LaL:1978h, title = {Effect of Soil Conditioners and Initial Water Potential of a Vertisol on Inflitration and Head of Wetting. In Emersion, Band and Dexter (Ed)}, author = {Lal, R. and Greenland, D. J}, year = {1978}, type = {Modification of Soil Structure}, pages = {191--198}, publisher = {J. Wiley & Sons}, }