Here is a good post from Rod St.John who graduated with his Ph.D. from Iowa State a few years ago. He is presently working in extension with Kansas State in Kansas City.
http://www.ksuturf.org/blog/2012/05/how-to-mow-your-yard-rebuttal-of-a-consumer-reports-article/
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Author(s):
Nick Christians Professor
Nick Christians, Ph.D. – University professor of turfgrass management, Iowa State University, Department of Horticulture, Ames, IA, and adjunct faculty, Department of Agronomy, Iowa State University, Ames, IA. Dr. Christians received his B.S. from the Colorado State University ...