An introduction to principles of soil science designed for graduate students in Environmental Systems and other groups. ES 201 examines the soil as a natural resource and soils as ecosystems. Soil is the reservoir on which most life on earth depends, as the primary source of food, feed, forage, fiber, and pharmaceuticals. Soil plays a vital role in sustaining human welfare, assuring
future agricultural productivity and environmental stability. Environmental soil science explores the major physical, chemical, and biological properties of soils, and fundamental processes that regulate interaction of the terrestrial biosphere with other components of the earth system.