"Reg Edwards" wrote
The input resistance of a half-wave vertical near to ground is 2 or 3
thousand ohms. It is uncertain because it depends on wire/conductor
diameter and on the conductivity and permittivity of the soil.
Because of its high value it is also sensitive to the antenna's
environment, trees, etc.
________________

Terman (Radio Engineer's Handbook, p 846) shows a chart for the radiation
resistance and reactance ranges for five, guyed MW broadcast towers, as
measured against a good radial ground system--an ohm or two above true
earth. For electrically 1/2-wave radiators, R ranged from 300 ohms to 450
ohms and Z ranged from about -100 ohms to -350 ohms.

RF