This text, aimed at upper-division undergraduate students, begins by defining the relationship among soil chemistry and other fields, such as plant science and pollution science. A detailed description of the components of soils follows, including inorganic, mineral, and organic matter. The book addresses cogent issues, such as soil fertility and soil pollution. The concluding chapter reviews future analytic advances in the study of soil chemistry, emphasizing the importance of the soil chemist in equitable and sustainable land use and agricultural policy.