The Soul of Soil: A Soil-Building Guide for Master Gardeners and Farmers, 4th Edition
Western Fertilizer Handbook
Teaming with Nutrients: The Organic Gardener’s Guide to Optimizing Plant Nutrition (Science for Gardeners)
Teaming with Microbes: The Organic Gardener's Guide to the Soil Food Web, Revised Edition (Science for Gardeners)
Botany for Gardeners, 3rd Edition (Science for Gardeners)
Hands-On Agronomy, 3rd Edition
Elements of the Nature and Properties of Soils (3rd Edition)
The Nature and Properties of Soils, 14th Edition
The Intelligent Gardener: Growing Nutrient Dense Food