I've been reading a book about the need to remineralise our soils (Australia) and the author makes some blatant claims about diseases in livestock being directly related to mineral deficiency in the soil. There's also a refernce to grapevines, something which I know a little about. The author claims that vines will succomb to phylloxera (a kind of root louse) if the soil is not adequately mineralised. Now...I have never heard of this, but I know that rootstocks will solve any phylloxera problems and, depending on the stock selected, nematode problems as well. So, naturally, I'm a little wary of the advice given throughout the book. The author also claims that weeds are a symptom of sick soil and that if the soil is in balance then the weeds will be displaced by other, non weedy, beneficial plants. Sorry, but this sounds like bullshit to me. Anyone got any thoughts on this?