Updated and expanded coverage of soil pedology and classification and soil life
Addition of insights of ecosystem ecology: the study of the flow of energy and materials within and between ecosystems including improved description of the decay process
References to soil/atmosphere interactions that influence global climate
Expanded coverage of the problems of poor nutrient management, including new information about the Gulf of Mexico hypoxic zone
New updated color soil map of the United States
New information about urban soils, including new modified and structured soils for use in urban settings
Emphasis on sustainable soil use and conservation prepares students to deal with environmental issues
An appendix is included to familiarize the horticultural student with basic chemistry concepts
Stronger ecological focus enhances the scientific and practical connection as well as expands opportunities for further application of soil science education.