FRACTIONAL COMPOSITION OF HUMIC ACIDS OF SOME SOILS OF THE OMSK REGION

Humic and hymatomelanic acids are components of organic substance of the soil. However, the question of their structure remains debatable. The conducted researches allow to recognize them as set of a large number of individual organic molecules which can be divided, creating gradients рН. On the other hand, to consider as complex molecular compositions easy hydrolysable at slight change of рН environment.