Gardeners experiment with copper or zinc wires wrapped around wooden stakes

https://www.scribd.com/document/1024146571/Electro-culture-Gardening-for-Succulents-and-Cacti-Special-Considerations-162539

Gardeners experiment with copper or zinc wires wrapped around wooden stakes, forming vertical antennas that channel subtle electrical potentials into soil, reportedly enhancing root development and nutrient uptake.