Materials matter: copper resists corrosion and conducts well

https://www.scribd.com/document/1026850706/ElectroCulture-Gardening-Journal-Templates-to-Track-Growth-147790

Materials matter: copper resists corrosion and conducts well, while galvanized steel is cheaper but heavier; choose durable wood or bamboo for masts, and avoid treated lumber that may leach chemicals.