I respectfully but strongly disagree. It's not only about the resistivity of the material, it's about the permeability. If you only read http://forums.qrz.com/showthread.php?272474-Use-Galvanized-Electric-Fence-Wire-or-Copper-for-Loop, you would understand. W8JI says it short and sweet there when he stated "I've had terrible results with electric fence galvanized wire on 160 and 80 meters". To quote Dr. Jeffries in the above-referenced PDF file, "we repeat the admonition to avoid conducting materials with large relative permeability, which in practice means avoiding any magnetic material or material attracted by a magnet. In such materials the loss is large". Some hams like QRP or QRPp. An alternate way to do that is to use magnetic wire for your transmitting antenna.