There is growing interest in soil health. A number of research projects have sought to explore this concept as awareness of the importance of soil biology to the functioning of soils as ecosystems has grown. The Tasmanian project Soil Ecosystem Health Measures: An Interpretive Guide for Land Managers was developed in response to a need to understand the biological make-up of our soils, to establish some benchmarking data with regard to optimum populations of various micro- and macro-organisms, and to provide landholders with practical advice to better manage this resource. This book is the principal output from this project. Carried out over 10 months in 2009, the project sampled a small range of land uses on the rich red soils of northern Tasmania.