Just received a book as a birthday gift, titled Square Foot Gardening. Started reading it, and found myself intrigued by the techniques outlined. It touts a method that uses no fertilizer, 100% yield in 1/5 the space. No doubt we will try one of the raised bed 4'X4' grids and give it a go this spring. My question to you gardeners out there is, have any of you heard of this gardening method, and are any of you using the prescribed methods in the book?