Abstract
In this work a γ‐ray computed tomography (CT) scanner was used to evaluate soil crust changes due to wetting and drying (W‐D) cycles. Changes in soil porous system (SPS) due to W‐D cycles of samples with crust have important practical consequences, because they can affect the soil water retention curve (SWRC) representativeness. CT data allowed detailed analyses of the soil bulk density (db) for thick layers, which cannot be achieved by traditional methods commonly used in soil physics. It was also possible to observe a decrease in db in the crust region. These results show that important changes can occur in SPS during SWRC evaluations.
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