Gardeners experiment with copper or zinc wires wrapped around wooden stakes

https://www.scribd.com/document/1022719499/Electroculture-Gardening-Tips-for-Urban-Balconies-and-Small-Spaces-198842

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.