Effects of subsurface irrigation on some soil physical and chemical properties

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Along with the extension of rotational paddy filed through subsurface irrigation system, estimating carbon and nitrogen dynamics in the paddy soils is getting important. We perform several column experiments to investigate change in redox potential in soil with solute and water flow. The change in redox potential was summarized based on the flow rate and solute concentration. For the evaporation process, the response time and changing rate of soil redox potential against the air penetration were clarified.