so i want to share with you just about a minute and a half from a wonderful documentary which deborah koons garcia has spent the last four years putting together, and it's going to be released to the public in march of this year called "symphonies of soil," and i hope all of you get a chance to see it when it comes out, but john reganold who is a soil scientist at washington state university, in the beginning of this film, tells us how nature developed and accumulated this soil in the various landscapes.