Stefan Wolfe wrote:
"The best earth ground is obtained by creating 180 1/4 wavelength
radials from the base of the vertical element".

Adequate but likely overkill. This was all settled in 1937 by RCA`s
Brown, Lewis, and Epstein. See Fig. 2.19 on page 120 of Ed Laport`s
"Radio Antenna Engineering".

Best regards, Richard Harrison, KB5WZI