Each individual plot had to be dug to different depths depending on the rootzone. The synthetic rootzones were only 6 inches deep while the USGA was 18 inches deep. The native soil plots were 12 inches deep.
Each plot also had to have a collection well dug with it. 
Ten plots were dug at a time and the soil was hauled away for fill at the other end of the C.A.F.S. site.
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