Hi I've been googling Bio char and wonder if anyone has used it in a broad acre situation? My soil is very sandy and I thought bio char could be helpful as far as water holding goes. But as I don't have a source of wood to make my own I would have to buy it and on the sites I was looking at it was very expensive if you wanted to put it out on pasture. cubic metre well over $1000 plus postage. That is way out of my league. Any thoughts?