Abstract
This study investigated the effects of compaction in four soils. The experiment involved equilibrating bulk loose soil to a known matric potential in a pressure chamber, compressing the equilibrated moist soil in metal cores at a given applied stress, and measuring the concentration of N2 diffusing through these cores into a diffusion chamber. The diffusion coefficient of N2 varied exponentially as a function of air-filled porosity and was nearly the same function for all four soils. A model for predicting the diffusion coefficient of gases in soils based on the diffusion coefficient of individual soil constituents overpredicted the coefficient for all four soils. A reduction factor suggested in the literature to account for blocked air slightly improved predictions. -from Authors
Original language | English (US) |
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Pages (from-to) | 1743-1750 |
Number of pages | 8 |
Journal | Soil Science Society of America Journal |
Volume | 56 |
Issue number | 6 |
DOIs | |
State | Published - 1992 |