It depends on his total farming regiment, what chemical additives , herbicides , and pesticides he uses. Many of the GMO seeds need these to thrive but real seeds are stunted or killed. The agricultural industrial complex kills all soil. It might not be the aluminum but all of the other crap he is doing. The problem is when they try to go back to natural farming it takes about five years to rebuild and detox. So they loose money during that time. I am surprised he is only calling out the aluminum. Search for info on Gabe Brown , and Joel Salatin .