IHSS&IWA26 / BRNO / CZECHIA / 23–28 August 2026 BOOK OF ABSTRACTS 226 Poster Session / Environment, Agriculture, and Forestry Hall A as well as in the composition of SOM between the FS and DM. Specifically, DM SOM has multiple indicators of increased humification and hydrophobicity, generally in the more tightly bound regions of the SOM structure. DM amendments could function as a source of hydrophobic SOM in agricultural systems, potentially sequestering nutrients and preventing runoff into waterways. Likewise, hydrophobic SOM in DM could aid in nutrient retention in reconstructed wetlands using DM as a substrate, while beneficially redistributing DM on the landscape. Acknowledgement Funding from the USDA Pilot Watershed Grant (Award No. SPC-1000007362, GRI129795) and Ohio Department of Natural Resources, Coastal Management Assistance Grant (Grant # DNRFHCZ24 306-04).
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