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

https://thrivegarden.com/pages/financial-benefits-of-buying-multiple-electroculture-units-discounts-explained

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.