A basic setup involves a wooden pole, a copper spiral winding upward, and a grounding spike or buried wire

https://arthurelps397.huicopper.com/future-farming-how-electroculture-could-transform-sustainable-agriculture

A basic setup involves a wooden pole, a copper spiral winding upward, and a grounding spike or buried wire, positioned near crops to capture atmospheric ions and gently influence local electrostatic conditions.