Gardeners experiment with copper or zinc wires wrapped around wooden stakes

https://www.scribd.com/document/1033234078/Electroculture-Gardening-on-a-Budget-Low-Cost-Materials-That-Work-205667

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.