In our experiments, carbonated water (CW) modified the equilibria in soil. Application of CW decreased the soil pH about 1.5 units one hour after irrigation ended. Minimal, though well defined, differences in soil pH were observed between the two carbonated treatments. The same relationship between the treatments was not found in pH levels of the leachate. This seems strictly related to the temporal and spatial changes in the carbon dioxide (CO 2 ) acidifying effect caused by chemical and biological factors as water descended the soil column. The temporary reduction in soil pH in the CW treatment induced the highest nutrient mobility for most of the elements.
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