[TowerTalk] Radial Ends Buried???

[Test]

This is my first post on TowerTalk.

I'm about to install 20 radials for a Hi-Gain AV-18HT and Hi-Gain recommends
burying the Radial ends if installing less than 60 radials. I called Hi-Gain
and asked them what they mean by "Burying the radial ends" and they
suggested a ground rod at each end.  I only have about 18 inches of top soil
and then solid Bedrock. What is the rational of burying the ends and how
deep?

73

Dennis- K7OGW