Аннотация: It has been revealed that the long use of soil (more than 100 years) without the use of fertilizers causes a low content of organic matter (OM) with a predominant fraction of fulvic acids (FK) in their composition. Systematic application of fertilizers makes it possible to improve the humus condition of the soil. The content of OM increases in 1.67 (NPK); in 2.24 (manure) times. The predominance of humic acids over the content of humates is noted, with the exception of the variant with a permanent vapor. The data obtained make it possible to predict the aftereffect of applying fertilizers in conditions of intensive farming.
Ключевые слова: organic matter, GK, FK humus, humates, chromaticity coefficient.