Qualitative composition of humus and physical and chemical properties of typical chernozem depending on the fertiliser system

The soil-forming process is closely related to the accumulation and circulation of organic substances, which are a source nutrients for plants released during mineralisation humus, so research on determining qualitative composition humus relevant. In this regard, purpose paper determine humic fulvic acids in typical chernozem, depending fertiliser system. leading approaches solving problem conducting field laboratory studies quality indicators dispersion methods establish accuracy reliability experimental data. Based conducted studies, it was observed that application an organo-mineral system leads increase content acids, while insoluble residue shows carbon content. utilisation fertilisers resulted reduction excessive non-humified substances. Additionally, soils these areas exhibited higher level substance humification. combination matter at rate 11.5 tonnes per hectare (8 manure 3.5 by-products) mineral fertilizer N27P38K45 crop rotation increasing trend buffering capacity chernozem soil. scenario, there absorption end second grain-legume by 6.05 mg/equiv 100 g, specialised 3.9 legume 3.06 g soil compared beginning first rotation. use increases third fraction rotation, affects ratio favour type formation. grain-planting 2.84 2.24 materials practical importance farmers when analysing fractional-group