This webinar from soil scientist Doug Soldat contains a wealth of information about soil management. 

He discusses the physical, chemical, and biological properties of soils in this seminar, and gives practical advice for turfgrass managers on these topics. According to Soldat, the physical properties are the ones that may require the most management. He discusses, among other things, drainage, a fascinating exposition on heat capacity of soil, soil test interpretation, fertilizer recommendations, the MLSN guidelines, new cutting-edge research, classical research, microbial supplements, and much more. All are related back to plant health or turfgrass performance.