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

https://dominickxree255.yousher.com/how-to-document-electroculture-results-data-photos-and-notes

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.