Barry J. Allred is a Research Agricultural Engineer with the USDA-ARS Soil Drainage Research Unit, and also an Adjunct Assistant Professor in the Food, Agricultural and Biological Engineering Department at Ohio State University. He is a licensed Professional Engineer and Professional Geologist. His areas of expertise are surface/subsurface hydrology, agricultural/geotechnical Engineering, soil science, geophysics, and geology.

Vahid E. Ardestani received the B.Sc. degree in Geology from the University of Isfahan, Isfahan, Iran, in 1988, the M.Sc. degrees in Mining Engineering from the University of Amir Kabir, Tehran, Iran, in 1990, and second M.Sc. in Geophysics from Institute of Geophysics, University...

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