Soil organic matter has long been considered a very important constituent of soils. Since the nature and abundance of organic ratter greatly influence the chemical, physical, and biological properties of soils, the relationship existing between the o...
Soil organic matter has long been considered a very important constituent of soils. Since the nature and abundance of organic ratter greatly influence the chemical, physical, and biological properties of soils, the relationship existing between the organic and inorganic fraction of soils deserves further study. The fact that organic substances have a tendency to react with inorganic clays is not new, but the exact mechanism of the reaction and the properties of the resulting complexes have not been fully studied. Much of the beneficial effect of organic matter is probably due to its tendency to combine with the inorganic fraction of the soil. Several investigators have observed that humic substances were more strongly absorbed by clay in an acid medium which may be explained on the basis of the amphoteric nature of the humic substances. (Shortened by ProQuest.).