Jeff Lowenfels “Lord of the Roots” author of the soil triology:
Teaming with Microbes: The Organic Gardener’s Guide to the Soil Food Web
Teaming with Nutrients: The Organic Gardener’s Guide to Optimizing Plant Nutrition
and
TEAMING WITH FUNGI
The Organic Grower’s Guide to Mycorrhizae
and now his new book:
DIY Autoflowering Cannabis: An Easy Way to Grow Your Own