Charity talks with filmmaker Deborah Koons Garcia about her new documentary "Symphony of the Soil". The film explores the world of soil- how it's formed, its life cycle, human uses and misuses in agriculture. Koons Garcia, the widow of legendary Grateful Dead lead singer Jerry Garcia, is in Iowa this week screening the film. Joining the soil conversation is Leopold Center Distinguished Fellow Fred Kirschenmann and Fairfield farmer and former National Program Leader for Soil Science Francis Thicke.