Em. Prof. Jan Glinski, soil scientist, is a full member of the Polish Academy of Sciences. He was Director of the Institute of Agrophysics in Lublin from 1982 to 2003. He was one of the initiators and an active promoter of scientific cooperation between many universities and institutes in Poland and abroad, and organized many international conferences on agrophysics. He has been a member of the ISSS since 1961 and was vice-chairman of the Commission I (Soil Physics) of the ISSS in the period1986-1990. He is the author or co-author of numerous papers, books, monographs, patents and multilingual dictionaries in the field of agrophysics. He participated actively in eight World ISSS Congresses (1960, 1964, 1974, 1978, 1986, 1990, 1994, and 1998). He serves as the Editor-in-Chief of the journal International Agrophysics (since 1992). Jozef Horabik is Director of the Institute of Agrophysics, Polish Academy of Sciences, in Lublin, Poland. He holds a M.Sc. degree in physics, a Ph.D. in agricultural engineering, and is a professor of agronomy. He is the Editor-in-Chief of Acta Agrophysica, an Associate Editor of International Agrophysics, and a member of the Editorial Board of the Polish Journal of Soil Science. He works together with over 20 scientific institutions in Poland and abroad. Over 260 scientific publications have been published to which he has contributed. His scientific interests are: applied physics, agrophysics, physical properties of agromaterials, modelling of mechanics of granular solids and food powders. Jerzy Lipiec is a Professor of Soil Science and Plant Relations at the Institute of Agrophysics of the Polish Academy of Sciences in Lublin, Poland. He received his M.Sc. (1969), Ph.D. (1977) and D.Sc. (1983) in Soil Science from the Agricultural University of Lublin. He contributed widely in research activities in various European countries, Japan, US and international projects. He serves on the advisory boards of several scientific journals and has published over 250 scientific papers. He is author or co-author of several chapters in books, including works as Soil Physical Conditions and Plant Roots (CRC Press).