Offers broad, general coverage of the important factors of soil management, updating soil classification terminology and including recent soil management research findings. Describes management of soil organic matter, soil water and soil fertility in terms of getting the the highest level of crop productivity without diminishing the soil's productive potential. Treats tropical as well as temperate region crops and discusses the specific soil management problems of each. The material in this book develops a history of erosion and the need for conservation. Covers erosion control, conservation structures, soil and water pollution, as well as fertilizer use and rotations. Also includes chapters that examine the world food problems and possible solutions.