Truth About Organic Gardening; the Benefits, Drawbacks and The Bottom Line. by Jeff Gillman. Jeff Gillman is associate professor in the dept horticultural science at the University of Minnesota, where he researches plant production and teaches courses on nursery management and pesticide use. he earned his doctorate in hortoculture and a masters degree in entomology from the univeity of Georgia. In this book he introduces over 100 gardening products and practices - organic and synthetic- and examines each to determine whether it is safe and whether it accomplishes the task for which it is intended. Experienced gardenenrs on both sides of the organic debate will come away in a much better position to make responsible, effective choices.