Gardeners experiment with copper or zinc wires wrapped around wooden stakes
https://www.scribd.com/document/1031205131/Electroculture-and-Soil-pH-Monitoring-and-Adjusting-for-Best-Results-162867
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.