Differences in natural fertility of soils are governed by factors and conditions of soil formation, as well as the composition, properties and the structure of soil. Also, the natural fertility is different in different soil zones. The most important problem facing the soil science today is the raising of soil fertility. Encapsuled in this book is the basic scientific information on soil formation, composition (chemical composition, organic matter, colloids, gases) and properties (physico-chemical and biological) of soil and also the classification of soils. This is followed by a brief description of the soils of some soil zones an regions. And finally, how under the influence of the appropriate complex of meliorative measures, any soil can be converted into a highly tame, fertile one?-is discussed. Various steps involved in agricultural melioration, forest improvement, hydromelioration, reclamation of salined soils and fight against soil erosion are explained in a simple and easy to understand manner.
