Tso-Cheng Chang is a small-scale farmer in Amherst, Massachusetts. His popular restaurant, Amherst Chinese Food, attracts people from all over the Pioneer Valley to its fresh, organic, delicious Chinese food. Dr. Chang is a strong believer in soil remineralization; he has been using rock dust on his organic farm since 1995 in his determined quest to eliminate the need for pesticides and to grow nutrient-dense food. At this point, his soil has become so rich that he has not felt the need to add rock dust in the last five years.