Читать книгу Hydrogeology, Chemical Weathering, and Soil Formation - Allen Hunt - Страница 18

Another major elaboration of the state‐factor approach initiated by Dokuchaev was due to Charles F. Shaw (1930). Shaw argued that soils are formed by the modification, and partial decomposition and disintegration, of parent material owing to the action of water, air, temperature change, and organic life. He expressed soil formation according to the formula

which states that soil, S, is formed from parent material, M, by the work of climatic factors, C, and vegetation, V, over a time, T, but the process may be modified by erosion of, or deposition upon, the soil surface, D. Shaw noted that each of the factors in soil formation is important in determining the character of soil, though under local conditions any one factor may exert a dominant influence.