Ray Archuleta (of the NRCS) has a passion for soil health that is infectious. Ray Styer has been doing soil health long before it was fashionable and has a gift for thinking biologically rather than chemically.

Please watch this video Soil Slake and Infiltration Tests - Live Demo:

http://vimeo.com/23850878

You might also appreciate other videos in his collection:

https://vimeo.com/channels/raythesoilguy/23850878