Date of Award:


Document Type:


Degree Name:

Master of Science (MS)


Plants, Soils, and Climate


S. A. Taylor


It is generally recognized that many of the chemical and physical properties of soils are dependent upon the surface activity of the finer soil fractions. The importance of the magnitude of the surface areas to such properties as base exchange, water-holding capacity, absorption of gases, and the plasticity of sols has been demonstrated. Attempts have been made to determine or estimate the surface of soils and soil fractions by various methods and to relate the values obtained to the physical and chemical characteristics exhibited by these materials. Most determinations have been based on calculations of surface area from mechanical analysis data, heats of wetting, hgroscopic coefficients, and other methods, but the results in general have only been approximations