Humus acids are known to occur widely in soils, peats, and natural waters. Soil fertility, migration and accumulation of minerals in natural landscapes, and mineral nutrition of plants are all associated with these acids. In recent times they have been used in industry and medicine. This book provides a survey of numerous experimental studies by the author in the Laboratory of Biochemistry of Soil Organic Matter. It also covers the most important Soviet and foreign studies on the subject. The book will be of use to a wide range of specialists.
