IHSS&IWA26 / BRNO / CZECHIA / 23–28 August 2026 BOOK OF ABSTRACTS 190 Poster Session / Soil Organic Matter, Caustobiolites, and Biochar Hall A In the RT, the differences among the soil types are pronounced more markedly. Similarly, the most pronounced factor represents the stability of HS and the proportion of aggregate fractions (PC1 + PC2 ≈ 42.79 + 23.95 = 66.74%). The second factor showed that processes of aggregation and humification are not totally directly interconnected. In the case of HC and MF, it was similar to CT; however, in HL and ER, the Dhum plays an important role. A higher amount of HS and Dhum does not mean a higher proportion of larger aggregates. In general, in the fraction composition of WSA, the quality of HS was more important than its quantity. In the CT, the relationships between the HS and WSA are more homogeneous, and the quality of HS is more pronounced; conversely, in RT, these relationships are more differentiated, complex, and less linear. Among soil types, the relationships between HS and WSA were most pronounced in ER. In CT, HA still partially support aggregation; however, in RT, their impact is minimal. The fraction of agronomically the most valuable WSA in the size range 2 –3 mm is a transitional fraction that does not have a clearly defined relationship with HA but is not yet connected to FA. These differences were more markedly shown in CT than in RT. HL was a transitional soil type in RT; a part of the binds was like HC, and another part was like ER. References 1. O.G. Chertov, N.V. Lukina, Forest Sci 8 (2025) 178. 2. E. Tobiašová, J. Lemanowicz, B. Dębska, M. Kunkelová, J. Sakáč, Agriculture 13 (2024) 818. 3. A. Gál, T.J. Michéli, E.J. Kladivko, W.W. McFee, Soil Till Res 96 (2007) 42-51. Acknowledgement The research was conducted as part of the project KEGA 009SPU-4/2025 “Incorporation of the issue of water in the agricultural landscape into the teaching of subjects focused on soil”.
RkJQdWJsaXNoZXIy NDA4Mjc=