Iron gardening tools versus copper gardening tools: What we were never taught

Viktor Schauberger was invited by King Boris of Bulgaria to examine the reasons for the great decline in that country's farming production during the 1930'S. The conclusion drawn from these observations was that another material other than iron should be used for farming equipment. His attention focused on copper. Copper-rich soils retained their ground moisture well, and so he began to experiment with copper plows as well as other equipment made from copper.