Barry J. Allred is an Agricultural Engineer with the USDA-ARS Soil Drainage Research Unit, and Adjunct Assistant Professor, Food, Agricultural and Biological Engineering at The 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.

Brian Bird is a geologist for the New York State Museum/New York State Geological Survey in Albany, New York. He received his B.S. in geology from the State University of New York at Cortland in 1995; in 2000 he attended Western Michigan University receiving his M.S. (2005) and Ph.D....

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