Teaming with Microbes: The Organic Gardener's Guide to the Soil Food Web, Revised Edition (Science for Gardeners)
Teaming with Nutrients: The Organic Gardener's Guide to Optimizing Plant Nutrition (Science for Gardeners)
The Worm Book For Beginners: 2nd Edition (Revised) : A Vermiculture Starter or How To Be A Backyard Worm Farmer And Make The Best Natural Compost From Worms (Backyard Farm Books)
14 Day Worm Castings: Convert 100% Of Worm Bedding Material Into Worm Castings In Just 2 Weeks!