Is There a Healthy Soil Food Web?

Dr. Langengham: All the nutrients plants need are already in the soils, in every soil. We just need the right biology to unlock them. If you put a plant in a very, very sandy soil with very little anything else, your plants aren't going to do well. You've got to have those 18 nutrients and if one of those nutrients is missing, the plant's not going to supply it.