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Oxygen transport to plant roots: Modelling for physical understanding of soil aeration

Knight, J; Cook, Freeman John


A model that couples the diffusion of O2 to plant roots at the microscale to diffusion of O2 through the soil at the macroscale is derived. The solution is complex, but if the length scales (Zr and Zm; see APPENDIX for list of symbols) are equated a simple analytical expression can be obtained. This model is used to investigate relationship between a critical air-filled porosity (θm) and the other parameters; viz temperature (T), O2 concentration in the bulk soil (C*), O2 concentration at the...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
Source: Soil Science Society of America Journal


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