The advantages are numerouse, such as the lack of an antenna support
structure, but for VHF arrays there could be a huge problem with
direction since the torque required to turn only a 2m 8-ele Yagi would be
over a ton.

That's why farmers used horses and nowadays tractors to pull the
array through the ground. But you know farmers: they always forget
to connect the feedline! That's why you never hear them on the air.

Hi Gerard, and there I was, thinking it was because an
underground transmitting station needed an underground
receiver station. Thanks a million, now I know why
there are so few farmers on CB.