Tony,
Admittedly I didn't read through the whole article. I've grown cautious of products containing the labels bio-anything ever since I learned that "bio-solids" in our fertilizers and soil mixes was just a pleasant sounding way of hiding pelletized chemical waste products such as toilet bowl cleaners or Prozac! What's worse is when I inadvertently discovered the fact that most of our Florida citrus groves are being fertilized with the pelletized sewage of NYC.
Biosolids Management Program "Plants grown in soils where biosolids have been applied are more resistant to disease and drought conditions."
Oranges Fertilized With Sludge Boston Sewage Contains Toxic Metals, Raises Safety Concern - Sun Sentinel