<P style="MARGIN: 0px">With an emphasis on the fundamentals, this book explores the important world of soils and the principles that can be used to minimize the degradation and destruction of one of our most important natural resources. Fully updated in this edition, it includes the latest information on soil colloids; nutrient cycles and soil fertility; and soils and chemical pollution. This edition is filled with hundreds of new figures and photos and continues to use examples from many fields, including agriculture, forestry, and natural resources. Taking an ecological approach, it emphasizes how the soil system is interconnected and the principles behind each soil concept. Updated information in this edition includes: </P> <P style="MARGIN: 0px"> </P> <LI> <DIV style="MARGIN: 0px">Engineering properties of soils</DIV> <LI> <DIV style="MARGIN: 0px">Expanded treatment of soil quality, soil degradation and soil resilience</DIV> <LI> <DIV style="MARGIN: 0px">A new section on septic tank drain fields</DIV> <LI> <DIV style="MARGIN: 0px">Expanded section on irrigation management</DIV> <LI> <DIV style="MARGIN: 0px">A new section on wetlands and their poorly aerated soils</DIV></LI>