Abstract
A comparative study of indicators of the state of organic matter and the structural state of two arable soils of the Tambov region - leached chernozem (Voronic Chernozems Pachic) and meadow-chernozem soil (Voronic Chernozems Pachic), cultivated with the same agricultural technology in one field, was carried out. The meadow chernozem soil was characterized by a higher content of humus and humic acids in its composition compared to the automorphic analog, apparently due to additional soil moisture and an increased supply of post-harvest residues. This is confirmed by the fact that the content of easily degradable organic matter (light fraction) and the level of its humification in meadow-chernozem soil were significantly higher than in leached chernozem. The degradation level of the meadow-chernozem soil, calculated by the ratio of the content of the light fraction was lower to the total content of humus, was lower, and the indicators of the aggregate and microaggregate state were more favorable than those of the leached chernozem. Keywords: SOIL ORGANIC MATTER, LIGHT FRACTION OF SOIL ORGANIC MATTER, AGGREGATE COMPOSITION OF SOILS, MICROAGGREGATE COMPOSITION OF SOILS
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