For those of you who were at the "Plant Soil Interactions" seminar that Dr. Thoms and myself presented at the Sports Turf Managers (STMA) meeting and the the Turf Producers International (TPI) meeting (and for anyone else who is interested) the full 6 hours of the seminar is now online. You will find it under "videos" on this page or go directly to https://www.extension.iastate.edu/turfgrass/video.
The videos are from a class that Nick Christians teaches at Iowa State. There will be a little bit of course information at the beginning of each lecture, but the full content is there. The course is Horticulture (Hort) 451 "Professional Turfgrass Management", which is available as a web based course through Iowa State University. If you would like to take the entire course, which is 30 hours long, contact me at email@example.com.