Allen V. Barker is a Professor in The Stockbridge School of Agriculture at the University of Massachusetts, Amherst. He has over 55 years of experience in teaching and research in organic and conventional agriculture and has interests in soil fertility and plant nutrition. He was raised on a crop and livestock farm in southern Illinois, near where his family has farmed since 1800. He was graduated in an Agricultural Science major at the University of Illinois, Urbana-Champaign, and received master’s and doctoral degrees from Cornell University. He regularly teaches courses in organic farming, soil fertility, plant nutrition, and organic farming seminars at the University of Massachusetts. He is a retired farmer.