Gardeners experiment with copper or zinc wires wrapped around wooden stakes

https://www.scribd.com/document/1032414459/ElectroCulture-for-Balcony-Herbs-Fresh-Flavor-Year-Round-205936

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.