Soil–air phase characteristics: Response to texture, density, and land use in Greenland and Denmark

Soil aeration is a key parameter for sustainable and productive agriculture. The intensification of agricultural activity in Greenland involves land use (LU) LU change, affecting the soil–air phase. combined effects natural compaction (bulk density, ?b), texture (texture uniformity index; TUI), on phase subarctic soils are not well known. This study aims to identify compare main drivers air-filled porosity (?) soil-structure changes within across sites Denmark. We analyzed comprehensive data sets ?, relative gas diffusivity Dp/Do), air-permeability (ka) measured intact soil samples from South (pasture) Denmark (cultivated, urban, forest). mechanical robustness air was evaluated by linear models ? as function ?b (H-model). ratio ka Dp/Do served index (?); latter significantly correlated TUI. Greenlandic pasture did show signs well-developed structure (low ?-values), whereas low H-values suggested were mechanically robust compared similar-textured cultivated soils. characteristic curve (? vs. pF) parameterized, moisture control accurately predicted TUI (R2 = .95). Overall, found air-phase functions field. However, considering ?-levels different fields, texture, LU, other environmental factors became statistically more relevant than ?b. A modeled response surface with conditions may, perspective, be useful better-predicting transport soil, both fields.