Found this tidbit while researching capillary action. It might explain what i have been seeing. I found it here.
http://croptechnology.unl.edu/pages/informationmodule.php?idinformationmodule=1130447123&topicorder=3&maxto=13&minto=1
Go to chapter 3 and go to the heading (water movement in soil)
Edited by Mikenesd 12/1/2016 07:21
 (loam over gravel.bmp)
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 loam over gravel.bmp (1406KB - 169 downloads)
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capillary action
